Mine is actually kind of twofold-- products, and the "rules" I put on myself.
For example, when I just scrap pages however, I don't have too much of a problem, but a lot of times I want to set out to create a cohesive album. I'll grab a template set from the store (currently, Traci's Insta-Album for my Instagram Vacation Photos, and Nettio's Photobook Frenzy for all of my DSLR shots from the week, to make two different little vacation albums-- the coffee table album for myself, my parents, and my grandmother, and then a small silly Instagram album for my son's bookshelf).
Anyway, when I set out to do that album, I try to stick to one kit or one set of colors to make it look most cohesive-- I want, as you flip through the album, to see the common colors and themes throughout, rather than each page being it's own unit with it's own color scheme.
This is great, when I'm gung ho at the beginning... but as the week or album winds down, I'm going "UGH! I HATE THIS KIT!" (which I don't, but I'm just at that point where I feel like I've exhausted it's potential for that little moment). So a lot of times, I'll end up with a half-finished album and never get it printed, because of burn out.
The second part is product:
I'm facing that burnout. It's Friday, and I'm on the home stretch of my album, getting farther into my vacation albums than I EVER have before, and I'm SO proud of myself... and then Miss Lynnette releases her cute little Summer templates for that mini photobook. Well, yeah, sure, I can buy it and start in on that project NEXT week after I get back... but it's so new and cute and something different from the templates I've been staring at all week and it reeks of fresh potential and newness...
....and I want so badly to unwrap my new goodies that old layouts and albums sit unfinished.
So... I guess my problem, in the end, isn't actually finding time to scrap at all... it's finding time to finish the darn layouts and albums I start. :/
(holy novel, batman. Sorry.)
ETA: Oh, and P.S. this sounds like I might be complaining about the amazing products the designers release. I'm not. The products are great. It's just that when you work with ONLY one kit (or one theme, or one set of colors) for one week, and use nothing else at all, then you end up kind of getting kit burnout. The kit itself is great, and I can think of a million other ways I want to use the kits I'm working with, other than that last 2-3 layouts of my album.
I think the problem is that the designers release so MANY good things, that I am using one kit that I'm starting to reach burnout on, just as the designers release something and I go "ooooh shiny!" and get distracted by the new, and want to just toss the old for the time being. :sigh: Total first world problem, honestly.