The D300 AF system is about the same, so will comment on my experiences.
Indeed.
For me: 9 focus assist points*, priority focus+release, AF tracking OFF**.
Turning off active D lighting will help your burst capacity, assuming you need a longer burst. Personally, I like ActiveD and leave it on.
Drive speed I have set to continuous low, more breathing space between frames to allow refocus. No point in 15 OOF shots, I'd sooner take 8 better ones - not that firing great big ripping bursts is my style!
I've also got the focus grid turned on and AF point illumination too.
**AF tracking is something that takes a little understanding, it can help but is situation specific. One thing I turn it to "normal" or "long" for is champagne spraying shots or rear MX shots. Remember as much as it hangs onto things when stuff passes in front, a delay is also imposed in other radical movements. I've extensively tested it and the manual is correct - turn it off for fast moving stuff. Football, you might find the suggestion from the manual is correct - can't remember what value it suggests but it does talk about football.
*9 is faster than 21, which is faster than 51. 21 might be ok for slow moving footballers

3D tracking is super sucky. If you plan to use it, make sure you read the manual. Bear in mind it requires a half press of the shutter release to pick a colour to track, then it will follow the subject. Now, in my mind, I'd take the advice from manual about similar coloured things that might appear in the frame - you know, the other ten guys wearing the same clothes... Try it out - if you have AF point illumination turned on, you can watch it bounce round the screen like a demented version of the classic arcade game "Pong". Why trust a brainless formula to get your chosen subject under a focus point - do that yourself is my advice!