I have been trying to find an optimal solution myself for a while. I used to have a google spreadsheet before. I like evernote/springpad. But all 3 are blocked at my work ___location and that's where I get most ideas that I want to record. IPhone form factor/keyboard doesn't allow for a quick note typing. For now, I am using a plain Google tasks list to record all ideas. I can access it from gmail or calendar and the google calendar is not blocked at my workplace. I would love to use evernote extensively, but till I get access to it at work, Google tasks does it for now.