If it's a warm, sunny day, the very best way to refresh your pillows is to fluff them up and stick them out in the hot sun for a couple of hours. They'll puff back up, and the sun will actually disinfect them better than anything else you can do.
If it's too wet to put your pillows outside, stick them in your clothes dryer with a tennis shoe (to help fluff them while they're inside) ~ Add a dryer fabric softener sheet and also give a quick spray to your pillows with an anti-bacterial room or fabric spray (i.e. Lysol). Turn your dryer on HIGH for about 10 minutes.