If you’re a fan of Openbox, you should take a look at urukrama’s excellent guide to setting up an Openbox system. He’s collected a lot of the best information available on the excellent little window manager, updated it and reorganized it for easy digestion. I’ve already learned a thing or two from it. 
Even if you’re not a fan, you should take a look. And if you’ve ever considered using Openbox you should definitely take a look, since it might be what convinces you to drop Gnome. 
Wow. Didn’t see that coming…
Thank you, K.Mandla. Now I’m wondering what you have learned from it
A lot of the information in their comes from here, actually.
The guide still has a few rough edges (and a few terrible typos), but I hope to update it soon. In any case, I’m glad it has been useful to some users interested in Openbox already.