1. You need to be a fan of Tenderheart.
2. When signing up, you must provide your name, a valid email address, and the country you live in. I prefer something that sounds at least remotely real -- any "john576"es will be edited to display simply "John", and so on.
3. If you're including your website URL with your form, make sure you have a link back to A Little Bit of TLC at fan.kawaii.nu/tenderheart. Use one of the codes if you please, and upload it to your own server.