Advice for startups on how to make money from online advertising
techvibes.com
techvibes.com
Then you can say "My site reaches 10,000 {doctors, practice managers, programmers} a month. Buy an ad, and they'll all see it sometime."
To this end, one of my clients of mine sells 120x240 spots in her sidebar for $250/month, and sells them out consistently (3 spots). All sites are different, but perhaps that can be useful as a starting point.
Another good tip I learned from a client, for finding advertisers: go to all your competitors sites/magazines/etc, and see who is advertising. Then call those advertisers on the phone. These folks are already geared to do media buys, see the value in it, etc. Should be relatively easy to get them to try you out too.
On the other hand, I run a music-related site that gets something like $0.25 CPM.
Fill rate (i.e. sold vs. unsold) is something to think about. Let's say you can command a $15 CPM from some advertisers -- would you rather have a 30% fill rate at the $15 CPM or a 90% fill rate at the $7.50 cpm. If your site has 1mm pageviews per month then you're looking at $45,000 vs $75,000. I'd be perfectly happy with a $7.50 CPM in this scenario.