Forum Signature Ads
If you regularly contribute to an online forum, you can use one of these text links as a 'signature link' to drive traffic to the website. People will read your thread or post, hopefully click on the link...and then you will make a commission if they go ahead and buy the product.
You could also add these text links to the bottom of all of your outgoing emails. Just follow the email preferences link in your email account to do this.
Please remember to change the YOURNAME to your Clickbank ID.