There is no hidden trick, though I don't own a famous blog like @denharsh which can help you but shoutmeloud.com is having all secrets on open floor.
If you have read shoutmeloud regularly then you know it very well how Harsh is earning with technology related topics. But mine are little bit different, I too earn good from affiliates, my focus is on UK, Germany & Russia market. Though I face too much language translation problem but some tools are really helpful.
Other than this I am having entertainment websites which gives good earnings from Adsense, where i write about hollywood & bollywood news & gossips.