1. Wait until your plug has been pushed off the board before plugging again. Even if you screw up and post a broken button/link, wait until the admin has removed the broken plug or it gets pushed off before plugging again.
2. Buttons for the 88x31 plugboard must be 88x31 pixels in size exactly. Buttons for the 468x60 plugboard must be 468x60 pixels in size exactly. If you have neither, you can just plug your text link into the top box or the cbox.
3. Make sure your host allows direct linking.
4. No porn or adult-rated sites, no scams or pyramid marketing schemes, and no sites promoting illegal activity.
5. The admin reserves the right to remove any plug for any reason, whether stated here or not. Repeated infractions will result in banning of the site posted.
6. I am currently not looking for affiliates, but other plugboard sites are welcome to post to the plugboards.
7. You may advertise and chat in the cbox, but you may not post the same message more than once in a row. Please keep chat family friendly.

Need web hosting? Here's some great options that I have personally tested myself and can recommend!
110MB Premium Hosting
I love this site for free hosting, but I always end up upgrading for the great features, and a premium membership is LIFETIME!
BlueHost
I use Bluehost on my commercial business sites, and they are fantastic. Great for high traffic, high bandwidth sites.

Need to raise your position on a topsites listing or visit counter? Drive instant traffic to your site with these totally free traffic exchanges!
EasyHits4You
1:1 Instantaneous Traffic! Awesome!
Traffic Era
My personal favorite because it's a lot of fun with team-based surfing.
HitSilo
Unique 'fill-it-up' system and a steady hit ratio keeps you coming back for more.
Traffic Generation Network
I like this one because it's simple and straightforward.
Traffic4You's traffic generator reviews
Find a number of traffic generation sites listed here.