Craig is an editor and web developer who writes about happiness and motivation at Lifehack We write a fair bit about what works in GTD and getting things going when you’re getting things done. Here are 9 ways to screw your system up from gtd.marvelz.com, based on their experiences. It’s not hard to fall into these traps, so keep weary if you’re in it for the long run. 1. Collecting and processing