http://webcentresurf.com/?221 they have a contest to i tell you what you have to only do:
Monthly referral contest : all Top 10 referrers now earn $0.10 per referral!
A valid referral is a member who has activated their account and surfed 20 pages.
Weekly surf contest : 1st prize: $5.00
2nd prize: a Student upgrade (value $5.00) for the best Free Surfer each week.
(1st and 2nd prize can only be won by the same member once every 5 weeks)
All other Top Surfers will receive Bonus Credits.
So sign up and i will give 1000 credits to start out with.