J.T.
THe tips below are great, another thing you can do is after you clean them all up, wipe everything you can down with vinegar. It destroys the ant trails (pheromones which they secrete so they can find thier way back and forth) which they follow, so they wont know how to get to that great spot they found (if they can't find the path to follow they wont go that way.
Once you do that you can then keep kiliing hte scouts they send out (wiping their trail up with vinigar ) eventually they stop coming.