Earlier quoted context omitted.
If you want something slightly more techy; the ONLY app that I absolutely cannot live without is Blitzmail on Android (I believe there's an Apple equivalent?) It's simply an an ultra-simplified one destination email client. One button on your homescreen opens up a little text input window. Hit send, and it emails yourself. That's it, and it has been absolutely life changing, I've retained so much and simplified so ma…
What is your workflow to process all the emails to yourself?
Most everything else in my life organization-wise, I use http://zim-wiki.org for. I just go through them and file them in ideas or todos.
I try to avoid using my phone as much as possible. The rule of thumb there is -- if it's not a real human communicating to me directly/individually or as part of a small group, I should try to just use the computer or not use it at all.