Developing Domain Names
The key to making the most money from domains is to develop them

Domain parking services are great to use as a temporary type of service. But if you want to make much more money from your domains, you should look into developing every single one of them. With domain parking services, you are basically splitting the revenues with them (who in turn get paid from companies such as google or yahoo for their advertising feeds). But if you develop a domain, you are essentially cutting out the middle man, and will get paid directly.

Mini Sites

You don't have to create an elaborate website. A mini site is just fine. You can write a few articles, put a contact page, google adsense ads (and other affiliates as well, you can look into Amazon.com, Clickbank.com, etc) and you are set. If you put a few articles, make sure it is original content (search engines love original conent). This will help you in getting precious search engine traffic over time and will earn you more money. If you eventually get great offer on your domain, then fantastic.

Next, The Mini Site For Profit