Don’t…
Don’t put them in with mittens
Don’t trade contacts with your friends
Don’t clean them with hot sauce
But for serious:
Do wash your hands before insertion/removal
Do clean your contacts everyday
Do clean your contacts with new solution everyday
Do put your contacts in their case while not using them
Do replace your contact lenses on their proper schedule (daily, bi-weekly, monthly)
Don’t shower while wearing your contacts
Don’t sleep with your contacts (unless they are Night & Day)
Don’t wear damaged (ripped or misshapened) contacts
Don’t put your right/left contacts in the wrong eyes
Don’t over-wear your contacts – take a couple days off a week to keep your eyes healthy