Ubuntu Geek provides a great little guide on speeding up Firefox. A lot of the about:config settings he proposes changing are already fairly optimal on a Mac, but disabling IPv6 seemed to make the most difference on my case.
I stopped doing GTD. And I totally shouldn’t have.
I have determined that the problem was the lack of an “always there” todo list and note taking device. I write too slowly and am not organized enough to use my moleskine (never mind that I also tend to forget it), and my lifestyle is too mobile to just use a laptop.
I tried iGTD and Omnifocus. Ominfocus was too heavy on the resources, though by now I should probably try it again (maybe when they come up with an iPhone rich client). I also used Circus Ponies’ Notebook, which was pretty nice but didn’t do spotlight with enough granularity. Then I tried Journler (for journaling, never used it for GTD) and now I’m trying out Evernote. So how does Evernote compare?