There are numerous options, but most people either go back to teach white jets (UPT), Smurf Jets (IFF) or ALO (Air Liason Officer) with the Army and call in airstrikes.
Usually most people get back to their primary MWS. A lot of people will volunteer for a "bad deal" (aka Korea ALO) so they can have minimal time out of the jet (1 year) and they usually get their choice of bases.
If you've gone ops-to-ops then you've probably expressed interest in going to Weapons School. After your second ops tour is up, you are PRIME for a remote tour or staff tour (something non-flying). Some guys do weasel their way into an RTU job or some other sort of flying gig, but it's fairly rare from what I've seen.