I got more traffic after Idle Status convinced me to delete and return close to 30 of my non-performing hubs to my blog and update others. I've only experience a notable drop (meaning major!) after the recent Google Panda update. Just horrible, but I think traffic is starting to return.
Just make sure you have good content and learn as much SEO as you can. Know that if you're just starting at this, it's gonna take some time to build search engine traffic anyway. This is what made the update so "devastating" to me. After a year my traffic was just beginning to take off. But I know it will return and increase as I continue writing. Patience is the name of the game with online writing. Cheers!