What is the best aftercare for tattoos?

NEVER use vaseline on fresh ink, petrolium jelly withdraws tattoo ink, makes your tattoo patchy, and will hurt like HELL!
Any creams that aren't petrolium based are good to use! A good recommendation is Bepanthem (nappy rash cream, ideal for healing skin), or palmer's cocoa butter with Vitamin E works just as well and smells awesome!