If there is swelling you might want to wrap it if you know how to wrap and ankle. I would also ice it on a 15 minutes on 1.5 hours off proticol.
In terms of prevention you need to get yourself two dynadiscs, a wobble board, and a swiss ball...

Sorry Bill
I think the best thing you could do would be to use more unilateral leg exercises to get the muscles that stabalize the ankle firing more. I would also ease into things. Lower intensity agility stuff to get the ankle ready for basketball.
This is stuff we have talked about in a couple of my Athletic Training classes so if its wrong someone smarter feel free to correct me.
Danny