Don’t spend much time building any of these projects. Get the to minimum list of requirements you’d like each site to have and move onto the next one. Do them over the weekend and don’t let them stagnate for too long.
I would revise this: Spend as much time as you want. If you get interested in something - keep going. Don't force yourself to keep moving according to this arbitrary list. Go where your interest takes you. JUST. KEEP. GOING!