I do 3 months in a seperate part of the apartment. In this time I try my hardest not to share anything with my established snakes. Anything I do (feeding, handling, cleaning, etc.) I do with the established ones first then wash up and move to quarantine. Then wash up.
I look at it this way. It's much cheaper to take one snake to the vet if it becomes ill then the whole collection.
I believe there is a quarantine sticky about the steps and percautions that are recommended.
edit: http://www.ball-pythons.net/forums/s...ad.php?t=74329