Assuming you don't have staggered size wheels, you want the most grip on the back.
If you lose the back completely, same principle applies. Slowly take your feet off everything and steer into it, do not wind too much lock on, as it'll grip, snap and then induce a tank slapper.
Find a big, wet car park and have a play. Contrary to Internet myth, they're not that easy to unstick, just a bit trickier to correct.