your changes are too big, you can simply hurt the brand your site has built over its lifespan. On the internet, the way a site looks is a big part of its brand. Whatever you do, your site still needs to use a somewhat similar design. By introducing the changes gradually, you can be sure that you won't shock your audience with anything. The more ready they are, the less user backlash you'll experience. Of course, if you're changing the framework then someday you need to just do it. But make sure that the user side of your site looks the same, so the visitors won't even notice. I guess that's it when it comes to my opinion on how often you should change the theme on your site and how to actually do it. So now I invite you to share your opinion. What's the perfect moment to switch to a different theme? written by Karol K Karol K. ( @carlosinho ) is a 20-something year old web 2.0 entrepreneur from Poland, and a grad student at the Silesian University of Technology. He shares his thoughts at newInternetOrder.com and ThemeFuse. Tune in to get his blogging and online business advice.