The main thing for my productivity has been figuring out what I want and don't want in life. That's a big rabbit-hole; to do it properly you need multiple Phd's in psychology, it feels like sometimes. Much easier to just dick around with this or the other Getting-Widgets-Cranked app.
Once you know what you want and don't want, everything becomes much easier. Don't fall into the trap of procrastiplanning, is what I'm saying.