Best way to drive traffic for Cpa

hi guys this is my first post on BHW. I have looked at this forum for like a week now and i am amazed how much valuable info there is on here.
I have read tons of post about cpa and found that is the path i want to take on internet marketing. I have already developed several websites using hosting services and blogs. I have created a content gateway to my site, and developed some good content.

now my major question is what is the best way to drive traffic?

i have tried mass emailing, facebook, youtube, indexing, and several others.
i have read tons of ebooks and i still havent had any luck.
I know there is ways if you want to invest money but at this time i dont have any money to invest.

so If anyone could please give me some input on this i would greatly appreciate it.

thanks,
Travdaddy09

there is no best way. there are many ways you can get traffic but targeting is another story. you can get digg traffic if you know what digg users want.or twitter, facebook etc. have you tried twitter?facebook? build relationship with your users then spam them.

facebook is the best i guess

Go for PPC and mediabuys type of traffic, that's what the big players do. But be careful, you can lose your shirt if not done properly.