Man why do people with established sites in such obvious money making niches keep having to ask this question. Just the other day I answered a pretty similar question for someone getting traffic for computer modding.
OP, go look at the posts I made in this thread
Legit Blog site, what do you guys think? because they pretty much apply the same for your situation.
OK, a lot of people searching in the skateboarding niche will actually buy things. They're looking for everything from boards to parts to clothing, etc. Even decals and things like that for their boards.
Instead of just posting ads for adsense, a blog like yours is perfect for actually selling things. Why take fifty cents to a couple bucks for someone clicking an ad when you could have your own add and make $20-$50 for getting a sale?
Start searching for ecommerce sites that sell skateboards, boards, wheels, and other parts and find some that have affiliate programs. Do the same for anything else that skateboarders like, tshirts with cool graphics, decals, ramps and jumps, etc. Then add some posts to your blog promoting some of the better products you find. Change your adblocks to display your own ads linking to the various companies.
Adsense is best used for niches in which you can throw up just enough info to get a good google serp, and just enough quality to keep the visitor from hitting the back button. But still not quite giving the user all the info they need so that they'll be likely to hit an adsense ad trying to find better information. For most people the way to make an income with it is to make many of those type sites that only make a few bucks a day each, but all the sites combined make a decent amount of money.
A site like yours is much better suited to actually create your own targeted ads and send those visitors to sites you'll get a commission from when they make a sale. Some of those visitors that made you the $22 by clicking on adsense ads, probably bought something from the advertisers you sent them to. If you would have been getting a commission on those sales you probably would have made a lot more. Also adsense uses an algorithm to decide what ads to display on your site, it's pretty efficient, but they still aren't always the best ads for a page. If you select the products to promote and the ads to display yourself, you can probably get an even better ctr than the adsense is getting now. You won't get paid directly for that ctr like you do with adsense, but your likely to make much more money in the commissions from whatever percent of that traffic actually makes a purchase.
Along with looking for actual product sales, you could probably find some digital products as well. How to do certain tricks, how to mod your own board, etc., check clickbank marketplace to find something is there and promote those products as well.
Once you've done all that you can even write a similar ebook of your own and get it listed in the cb marketplace. Promote it from your own site to make some money from it yourself, but even more important is if other cb affiliates start selling that for you as well.
So there's some ideas for you. Hope that helps. :cool2: