At the times I'm not at home/office, or at the times I want to watch the beautiful sunsets from my porch, I work using my laptop, instead of a regular PC. While I like the laptop keyboard far better than a regular keyboard, I hate the touch-pad. It's just not usable.
So whenever I work with my laptop, I get to learn some new keyboard shortcuts, since it is the only thing that keeps me sane.
Recently things got a lot better, since I started using the keyboard shortcuts provided by Google's products, especially GMail and Reader.
While GMail keyboard shortcuts requires you to turn them on via the settings, you get those for free in Reader. If you can't remember a shortcut, simply press "?", and you'll get a nice popup reminding you whatever there is you need to know.
What I like best in the combinations they chose, is that they remind me the shortcuts of UNIX utilities (yes, VIM included). I guess this was intended, and I'm thankful for that.