I think you need to go away for a week so you relax from everything. I'm part of a 4 people team too and if the main developer is stressed out I'm more stressed out. Before we used to work like crazy. All nighter kind of thing and even if we agree of not working during the weekend, you still go in and do some work. I know the feeling but you've got to give yourself a deadline. It took me 2 years and the Indie company i'm in has been making games for 6-7 years. 2 years to train myself; get up, leave, sleep, you can do that the next day. we tried organizing but at the end of the day, 10 tasks done, ticked and there's like 20 more to do. It's just not enough. One thing I learn, hardcore, is that you can never manage your time. let it go, just do your best. take a rest, sleep more than 8 hours on the weekend. do something on a weekend. but if the project needs you to work late, go for it. just don't do it everyday