Event scheduling I do in "remind calendar" for Linux with a little notify-send.

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.