You won't be able to brush your teeth for a while after the op, (I was so swollen that I could barely open my mouth for about 24 hours), so get a bottle of Oraldene antiseptic mouth wash to help keep the sockets clean & your mouth fresh. Just swill it very gently in your mouth, not vigorously or you may disturb the clots in the sockets.
Rinsing with warm salty water several times a day is also good.
If you get any throbbing / hot feelings in your mouth after the op, go back to see the surgeon asap as you may have an infection.
I felt dreadful a couple of days after I had my wisdom teeth out, and took painkillers & went to bed. I woke up with burst stitches and blood and gunge all over the pillow
Oh yes, and cover your pillow with an old towel, as your gums may bleed a bit while you're asleep.