I've just removed the google adsense ads that were on my blog. Initially I thought 'ooh, extra cash', but once I'd implemented it I began to realise that it's very unlikely to make much or any money. Even if my blog was super popular, I still don't think many people would click on the ads (and they'd probably be my competitors since I'm talking about paris and apartments most of the time!).

So, faced with either making $1 every couple of months or a nice ad-free site, I got rid of them all.