A quick way to promote cpa offers is to buy your own domain name and point the offer link to the domain. This is a good way to get started. You could do some keyword research before buying the domain. Go to the google free keyword tool and see what people are searching for related to your offer.
Once you get your domain, just get your affiliate link and setup domain forwarding. It really is that simple. So if you had a cpa offer for the apple ipad, you could create a domain like howtogetatabletcomputer.com or something similar. Then start promoting the new url.
Domain names are not that expensive and they can be a good way to cloak your affiliate link. A dot com domain name looks much better to someone than an affiliate link. Make sure that you stay on the lookout for domain name deals offered by the registration companies. Picking up a domain for a discount can be a big help to your cpa business.