Domain Parking is like buying a property & keeping it for future gains. Normally you can buy domains & auction it off when you get a good price for that domain name, but in the meantime domains can be parked with some sites offering Parked Domain Services and you can also earn some quick bucks in the process. One has to change the nameservers after registering with a parked domain site, then they will place related words & phrases on your site on the basis of the domain name. When a visitor comes & clicks on one of the advertiser then you get paid for the click.
For domain parking services,the following one are the best for their ontime payments and great support.

1. Parked.com
2. Fabulous.com
3. Domainsponsor.com

But newbies can find it difficult to get approve on this sites so they can try thise out:

1. Namedrive.com
2. Sedo.com
astly, domainers forum and resources:

1. Namepros.com
2. DNforum.com
3. Domainstate.com
4. DNjournal.com