Like this:

Contest URL: Win $500 Cash And An Ipod Nano Now – Free

Deadline: End of the month

Prize: Win Free $500 + an iPod Nano

How to enter:

• Post about this competition in your blog and link to the contest home page (5 points)
• Post about any other post in the contest blog and link to it(5 points)
• Stumble, digg, reddit, technorati,etc..i.e:bookmark the contest post at any sicialbookmark site(3 points each)
• Bookmark any other post at any socialbookmark site(3 points each site)
• Add my blog to your blogroll(4 points)
• Comment at any of the post in the contest blog(not spam!)(3points)