I like to use 1 ounce of priming sugar (corn sugar) by weight per gallon of finished beer. You could use table sugar, but a bit less.
If you don't have a scale, I'm not sure what the measurement is but I've heard that 3/4 cup of corn sugar is abour right for 5 gallons.
Broken Leg Brewery
Giving beer a leg to stand on since 2006