Spatial Navigation in Opera
The only browser I've ever managed to work with successfully is Opera, and most of my surfing uses the spatial navigation feature. Basically, you hold down shift, and use the arrows to jump around hyperlinks - much nicer than trying to tab around the place and getting stuck on some long list of links!
Opera has fabulous (and configurable) keyboard shortcuts. I could go on forever but my favourites are:
1 and 2 Next tab/previous tab
0 and 9 Make text bigger/smaller (its actually a zoom, so it works on pictures too)
6 Put the page back to the original size
Ctrl+t New tab
Ctrl+w Close tab
Ctrl+alt+z Open a tab that was closed, with all data still intact (I love this one!!)
With all of these put together, I can do pretty much everything.
So there we go, if you have RSI problems, try using the 'net from your keyboard. And if you thought "accessibility" went with "disabled", think again.