I can understand that. I've had less trouble with exhaustion since I started keeping most Sunday afternoons completely free so that I know I have one afternoon a week when I can just vegetate if I need to. If I don't need to, that's a bonus, and I can just do whatever has me excited at the time. The recent bout of insomnia did give me a bad run of not getting much done on Saturdays, though. Fortunately that seems to be improving now - sleep onset started working properly about a week ago, which was frustratingly followed by a few days of early-waking insomnia, but the last two nights have been okay on both fronts. I think doubling my dose of methylcobalamin may be responsible; it's a specific form of B12 that has got good results for DSPS in Japanese studies, although those haven't been replicated in Western research. Frankly, though, at this point I don't care if it's a placebo; I've been taking B12 in other forms for years because it helps with depression, and a placebo that basically only requires me to switch between brands of a very safe supplement doesn't really have much in the way of downside. The new dose is closer to the ones used in the Japanese studies - I would have started on it in the first place if I'd realised that, rather than going with the lower dose suggested on the bottle.