Well, if have a whole hoard of albums, you're not really going to listen to them many times over. So... I suppose.
Just saying this because I feel it's important, never, ever underestimate planning a story. It's a mistake I've done, which is why I've scrapped various ideas. It just provides a backbone to the story and makes the whole process much more pleasant. I'm trying it myself as I've finally decided that planning is best for me. So far, I have 28 pages of my disjointed plan and I intend to get a lot, lot more. I say disjointed because at this moment in time, I'm sketching my ideas down and seeing what fits and what doesn't. Funnily enough, I'm incredibly happy with all I've done - well, almost all... there were a couple of ideas I stuck in and thought later that it just wouldn't work. The piecing together will come later.
I would suggest that, since you have the characters worked out, write what exactly you've worked out. Just so that it's absolute concrete. Just so that you're absolutely certain you know the characters and won't be forgotten, since they're written down.
Having the motivation... yeah, I get that problem too. In the beginning, ideas simply flew into my head and now I've just halted. Problem is, I'm still aiming high and I'm creating this complex, hopefully clever novel where I'm trying to get literally hundreds of characters in my plan, even if they're just very, very briefly mentioned. I think it's because of the type of story I'm creating that I feel I need to do that. For an ordinary novel, I'd think differently.
Sorry, I feel I need to post more, but I've taken sleeping pills, considering that I seem to struggle to get to sleep and always seem to go to sleep at like 3:00am. Right now, I just can't think about what I'm saying and... for the second time in a row, I feel shattered right now. This is my second time taking sleeping pills. Think I may get addicted...
I hope all goes well for you with writing anyway. I think it's the apparent lack of progress that's sapping your motivation. I merely created rather plotless stories, or part of it, so progress was rather easy for me, so I kept going and going until I found out it's absolute trash. It's not really trash though, since it's practice, and I can see my strengths and weaknesses.
Oh well, I'm turning in for the night. Goodnight. 
By the way, I've just had a quick peek at Testing the Waters because I'm intrigued with how your writing abilities are. From the looks of the first paragraph, I am pretty damn impressed. I would (or wouldn't say anything of the whole matter) otherwise. I'll take a much better read of it tomorrow. Promise. 