Paid ads on sites or blogs seem the best way of earning?

I've been looking over all the ways I've been trying to make money online recently and have decided the simplest thing is to keep blogging and add paid advertising to my blogs or use a blogging service like this one where they do things automatically. If your blog is popular you're almost guaranteed to earn some money from the advertising. Google Adsense ads are quite clear and even internet newbies will be interested in viewing them. Also Google always has ads which go with what you're writing about so readers will always be interested in the advertising.

I've tried AdBrite but I don't really like this program. For some reason the ads and search engines don't really go together and having AdBrite on your sites can in fact lower your page rank and make your blogs or sites come up lower down in the search engine listings. Bidvertiser, another paid ad service, isn't my chosen program for paid ads either, as sometimes the ads don't really correspond with what I'm writing about on my blogs.