As obvious as it may seem some might overlook it. Keeping your contacts list up to date ensures that you always have a ready supply of test subjects at your fingertips! The better friends you are with each of them, so to speak, the more inclined they are to do you a favour from time to time and maybe check out your new site or product offerings... Who knows maybe it even results in a sale or two? What’s more, if you can keep your offerings in line with the type of thing any particular friends or family members would normally go for, there's every chance they wouldn't mind forwarding it on to all their contacts if you just added a subtle link in an e-mail or so on...

Anyone you know what i mean, keep a full contact list and carefully select groups of contacts to mail "Special" tailor made offers just for them!