[hboon]

> the idea that, if you can do something in 5 minutes or so, just do it rather than keep putting it on to do lists.

A small, but important part of GTD: there is a concept of a "capture system". As soon as there's something that's a TODO or task to be done and you are working on something, put it into your capture system, be it a text file, a TODO app, etc. Process the capture system regularly, filing the items into projects (can be as simple as separate TODO lists). So here's the key difference to what you mentioned: only now while you are filing, do you do those tasks that take 5 (or 2) minutes or less.

As a developer who works on my laptop most of the time, I have a global keyboard shortcut that brings up a prompt with textbox that lets me quickly something (appended to a text file) and go back to work without disrupting my flow.