Oh, I so get that! Recently I worked all day long, and then went home and begun to work, trying to participate in so much airdrops/bounties as I could. Next day I was sleepy so couldnt work as usually.
Of course it was my additional income but I believed that it would enrich me someday. At last I calculated my earnings and was surprised a lot it turned out that the Pareto principle was really right, because 20% of my actions (signature and content creation) gave me 80% of the profit. Other activities were at least wastage of time.
After this I concentrated on content creation/signature bounties and didnt have sleepless nights more)