The orthodontist might give you wax to put on the brackets if they rub your lips painfully. This is not enough. It sounds odd, but get some wax earplugs so you can put big lumps of wax on the brackets at night.
Also, be careful of some foods. The ortho will tell you not to eat toffee or anything very chewy or hard, but bear in mind things like spaghetti which will hang from your braces most unattractively, and spinach which will be hard to get out.