I rarely change things around, because I don't wont to spend the time and I'm not that tech savvy. In fact, in the six years or so that I've been doing this, I think I've only changed it a total of now four times, the last being the longest.
I LOVE Shabby Blogs. I haven't found anything else that I like as much for blog backgrounds. I also researched for new free side bars and came across A Typical English Home. It is an AWESOME site! I've spent hours on her blog reading and doing a lot of the tutorials. I followed her tutorial for adding sidebars via html codes, adding social media buttons, and adding a post gallery. I also used her free graphics for the sidebars and social media buttons.
I hope that it's been worth it. I like it and that's all that really matters. I also took an image from shabby blogs and fiddled around with the header a bit. Turned out pretty good in my opinion.