Search Google for StumbleBot based scripts:
Search Google for
Code:
inurl:menu=free_stumbles
and include filtered results
Visit each one of them and get 3 free stumbles from each site, use different browser and URL's to get another set of free stumbles, as more and more sites start using the script you will get more free stumbles
Edited by Nick Flame
Do not ask for rep, read the rules, thanks.