The best way to avoid a DDoS attack is to not get into a situation that would cause one to happen. (I.E.: Do not provoke people who claim to be "hackers" or who claim they will DDoS you. Even if they are script kiddies, they still probably have access to a booter and will try to hit you offline.)
Other than waiting and changing your IP, there isn't much you can do. 5-10 minutes will not kill you.