... When working on a big project? Lately, I've found myself getting tired at around 8:30 p.m., and shortly after, I get so tired that I can't concentrate on writing at hand, and I drop down at 9:30... and last night, I went to bed a few minutes after it turned nine. That's how I know I seem to be on the right track, but damn it, it's annoying! I don't have a particularly busy schedule most of the time, but I find myself sleepy just the same. It just happens every time I work on a huge project. Is this normal for anyone here as well, or is it just me?