I used to keep everything in evernote, trello, google docs, email etc.. Then I decided that I do not want my most personal information stored on someone elses computer so I moved to txt files on my local HD. I had about 5 text files going with todo.txt, weekly.txt, blog.txt. 3yearplan.txt and such. Then I just wrote a javascript app that manages tasks for me using require.js, backbone.js, underscore.js, and bootstrap. Works great, uses local storage, I'm happy.