pop the dough into a bowl and leave it in a warm place until it doubles in size (depending on warmth 1/2 to 1 hour), shape or put into bread pan and pop into a cold oven where it can do a second rise as the oven is warming up.
I've always followed what the UK cook book says and only do 1 rise for an hour and then pop the loaf into a hot oven. The other day I had to do 2 rises as I dropped the tin (tin side down thank goodness) as I was putting it in the oven and the bread deflated so I knocked it back and let it rise again. I really didn't notice any difference between this loaf and the ones that had risen only once.