you want it to dry out. so keep the area clean and dry. dont put make-up on the area for a couple days. there are a ton of lip balms that fight herpes out there. two that come to mind are carmex and herpacin-L.
google "herpes food triggers"
stay away from those as soon as you feel a tingle or if you are broken out
keep the area from getting over exposed to the sun. which can cause outbreaks.
dont touch it with your bare finger as it can spread to your finger.
look for things that boost your immune system like echinecia.
keep a litte journal on what you do and what you eat to find your specific triggers. it could just be pms which you cant do much about to prevent.