I feel I'm more productive if I have 2-3 "major projects" going on at once. Whenever I get frustrated one I can switch and continue later after I get tired of t

I feel I'm more productive if I have 2-3 "major projects" going on at once. Whenever I get frustrated one I can switch and continue later after I get tired of the other one again. Helps if they are not very similar. Currently I have a Facebook app and the Japanese candy service going on, which have almost nothing in common.