Read the sites Terms and Conditions carefully when registering.
Always give your correct address and details, so that the site know exactly where to send your gift.
If you do the Lovefilm offer, you will not be credited until you receive 1 dvd and return it, remember to add a dvd to your basket
When completing an offer you should use the same email address as that used to register on the free gift site.

Don't start to refer people till you have completed an offer.
Never get someone from the same house or computer to sign up to your link. Its 1 account per person, per household.
Don't sign up to the same site more than once.
Don't complete more than 1 offer per site you sign up on.