Hi,
Pay Per Click advertising is a good way to bring real visitors to your website (However I must admit that it is not the cheapest one). My questions is what kind of advertising programs do you use? Here are mine below.
Host Color - The HC's
web hosting affiliate program - You know... a good way to earn some money with HC. Pays PPC + commission per sale
Adsonar.com - An expensive but quality PPC campaign in some of the biggest news websites in U.S.
BySellAds - a Good network to advertise in some very popular blogs and websites. It offers monthly prices for difference ad positions. I have tried it. Some of the blog ads have poor results others are fine.
Text-Link-Ads - It is good for publishers who want to place text links on their websites. The TLA gets 50% of the selling price on any link position, but their program still worth's. I'm using this one for more than 2 years.
AdWords - i like Googles advertising program, but anyone who is using it should be very careful because it send a high number of invalid and/or non targeted visitors and provides poor return of the investment.
These are some of the advertising networks and resources I use. What about yours?