If you don't have a dedicated scrap space

No scrap space, no desk, no office space. I live in a small city centre apartment and keep my scrap goodies in my wardrobe.    

The only way I've found that works for me is not to create an actual stash. If I buy something, I have to use up at least 50% of it ASAP. I only hoard the most hoardable of the hoardable. Being harsh and cutting my supplies down helps to keep me going and make this craft manageable in a concentrated space. I'm out of stuff to use when a project is done and then shop, patiently wait for it to arrive (especially long with international shipping during the pandemic) and get super excited I have something to get crafty again when it arrives. It's a sort of short-term cycle approach paired with project-specific buys. 

With a small amount of stuff, it's so much easier. All I need to do is open my wardrobe, take out my boxes of scrap stuff, carry them to the sofa in the living room and get started. A lot of my crafting is done while I do something that doesn't require too much attention/visual focus like conversations with my SO, watching something silly on Netflix, being on the phone with someone, etc. This is obviously in complete contrast to most of the (American) crafters in here who have a dedicated space and use alone time to scrapbook but it works great for me.

ETA: For you, it might be really practical to have your LOs/current projects "out" in some way. Clear cases for your current projects, a kit case if you're into making your own kits, etc. Having them in a place that's close to your usual scrappy spot (kitchen table or wherever you get busy) should help to feel ready to get crafty easily. I'd probably find a way to store my most used tools there as well so I wouldn't have to run around to get them. 

Before I had a dedicated crafting space, I used my dining room table. I kept most of my supplies in a glass door bookcase that I hung curtains inside to hide the mess, and the rest of my supplies in a pantry closet that doubled as a home office. I hid my big quilting mat behind my china hutch.

Using the dining room was great! I had a couple of neighbors who scrapped, so there was plenty of room for 3 or 4 of us. We'd take turns getting together at each other's homes and we'd open a couple bottles of wine. I miss those days!

Oh, and I keep maybe 10 or so page kits (photos matched with a few papers) in an Iris box waiting to be scrapped, and I'm usually thinking about them in the back of my mind for awhile before I scrap them. I'm not sure it speaks to motivation, but it seems to be a pretty regular part of my planning process (it might look like procrastination, but I'm calling it planning.) 

I have a scrapbook room, but it doubles as my work-from-home office (which is now practically full-time because of the pandemic) so I need to be able to put projects away quickly so I can use my desk space for work stuff (and not be distracted by in progress projects that I want to work on instead of working! ha). I also can't focus if I have lots of mess around me, but I often have multiple projects in progress at once so I tend to pick up everything except the one I'm working on. So I have a few different systems so in progress projects aren't left out that could be adapted based on the system you are working with.

I have alex drawers from ikea under my desk and use a couple of drawers in them to store larger "in progress" project, mostly mini album stuff like a travel album, december daily or week in the life. The drawers are large enough that a 6x8 album can fit in it with any supplies and I can just pull stuff out when I'm working on the project and then put it all back in the drawer when I'm not. This works both if I need my room for other things or if I'm working on other projects.

For smaller in progress projects, like a scrapbook layout or a project life spread, I have two systems depending on if it's a story kit spread or not. I subscribe to Ali Edwards story kits and use clear plastic trays that stack to store my current kits. I will put any in progress spreads back in the tray with the kit and stack it back on the shelf. For anything not story kit related I use the boxes (either the top or the bottom) that Becky Higgins large pack of page protectors used to come in (I have a lot of those). They are sturdy cardboard trays that are about 14x14 and have 1 inch sides. I store in progress pages or other smaller projects in these trays and then stack them in the space on top of the alex drawers under my desk (there's about a 5 inch gap from the top of the drawers to the bottom of the desk).

Basically, whether it's a drawer or a tray, I find that the easiest way to get an in progress project out of the way is to just stash everything specific to that project--mini album, page protectors, paper, photos, embellishments, etc. in a tray/drawer that can easily be pulled back out again. The trays are especially nice because I can pull them out on top of my desk when I'm ready to work and then pile everything back into it at the end without wasting a lot of time.

When my kids were tiny and I needed to protect in-progress pages I would put the paper and scraps and pic I was using in a baking tray. I had a few of them, and would just nest them together to tuck up high out of their reach.

Could you just take over a little corner somewhere? I've shared before that I took over one end of the LR. It works great. I don't care if it doesn't look like a model home, we live here.

 by Mikk Lynn, on Flickr

I had a very small home for 33 years. Eventually I had a desk in the family room that sometimes had space to scrapbook on. Before that, I had a large cutting board on my lap for my table. My supplies were in a crop bag and stashed anywhere around the house I could put them. Sometimes I sat cross legged on my bed, with my cutting board “table” on the bed in front of me. It fit two 12x12 pages side by side, which just a tiny bit of each hanging over the side edges. It worked.

I got a small group of other scrapbookers together, all gals that I knew. We met at the library once or twice a month. The room there was free. You just had to sign up before someone else reserved it. That’s not an option right now.

Motivation isn’t about having a dedicated scrapping space. I have my own space now. I got more scrapping done when I had to scrap on the cutting board.

If you are excited about your pictures, you can scrap anywhere, even just on a floor. I used to do that sometimes, too.

That was always my issue. I’d get interrupted and stuff had to go away right away.

It is frustrating.

It's kind of funny, I have a scrap room full of supplies, but I got most of my scrapping done when I didn't have a room, my kids were younger, or when I traveled for work and I only had one Iris box of things to work on. I'd whip out the hotel room ironing board and work on a small album. For me, it isn't the room or the supplies as much as my mental state of wanting to get something done. Even when I have my scrap room with a tv, I'll drag something to my bedroom, so I work on my bed and pet the dogs.