Here is a very easy $15 for you. This website has about 5 pages of offers and a lof them are free and with instant credit. This is how I started and when I got other people to do it for me I got them Green in about 30 minutes. So just reply to this thread or PM me for the referral link.
$15 -- www.yourfreeiPhone.com -- 1 offer
Just remember not to sign up with the above link until I give you my link