Notes, bugs, new ideas, planning and requests all managed with Trello. Extremely easy to use and simple to share with other coworkers.
I just use Evernote
Trello here as well!
I have several “Organizations”: Envato, [IRL Business], Collab, Life, etc., etc
Each project gets it’s own “Board” under the appropriate organization.
With each “Board” you can have several “Lists”: To Do, Doing, Done, Bugs, Requests, etc.
Each list you can setup unique “Cards” – which can serve any purpose you need.
With the Android (& iOS) app, and hooking into your Google Drive as well as email – it’s just too awesome not to use!
Few items and all things in my head now
I am old fashioned, I like the idea of writing on paper. I use an agenda where I note all the passwords and ideas and improvements. I take it with me everywhere. Don’t ask me what I’ll do if I’ll loose it
I carry a very little notebook and a pen wherever I go. It’s full of random stuff that not only does they remind me of ideas but they boost the creativity when I start reading them after a while. I have very short short-term memory so I forget what’s in there often – the benefit is multiple reading of “new” stuff