1. Join the site as a player (although deposit may or may not be an eventual necessity, if a bonus is involved, you can qualify if you do).
2. Click on the affiliate link on the site's home page to read the various terms and payouts for being an affiliate.
3. Open the affiliate account. Most sites has this separate.
4. click on the link fo rpromotional materials or affiliate tools. Here they'll often help you generate the banners and specific web addresses and codes that will direct new players to sign up under you.
It's really easierr than it sounds. The above procedure should take little more than 30 minutes to start up.
Questions? Comment here, and I'll help you out.