I'm a relatively new Mac convert and am ready to do my first OS upgrade from Snow Leopard to Mavericks. I'm a little nervous and hesitant since everything has been working so well for the past 2 1/2 yrs (are you listening Microsoft?). I've been using Time Machine religously and just made a drive image copy as well. Are there any other words of wisdom or potential pitfalls I need to be aware of before proceeding? Thanks for your help.