Hey Salty (or is it Mr Dog?),
Your symptoms are almost extactly like mine.
I thought it was laziness, but now I realize it's something different. A few months ago I began to notice that only on Sunday evening could I quit twiddling and really get down to building. Oh, I could do it maybe a couple of hours here and there during the month, but for the most part it was Sunday night or nothing. Any other time that I sat down I'd reorganize the bench, read Scale and Details, clean tools - just like cirikili said.
I realized that modeling uses a different side of my personality than anything else, and I have to be relatively at peace to use that side. After a week of work, it takes me until Sunday evening to chill enough for patient, careful, and (dare I say it?) artistic work. Then it's Monday morning and it starts again. Those few hours on Sunday have become the sweetest hours of the week. My models may not win contests, but they give me something to look forward to in those last weekend hours before I start another week at work.
[I like my work, but it's demanding.]