Last year I changed the look monthly. Or maybe that was earlier this year. Last year might have been seasonally. I like to take photos and have them as my background. Currently I am using a theme from http://www.thecutestblogontheblock.com/ I'm more likely to change the look with various hacks and widgets.
While I am almost always adding new buttons or images that suit me or help with networking, as far as changing the layout (or banner in my case), only once a season (or holiday) for me. It takes a good amount of time to play with a blog, and though I want the look to suit my personality, I don't have the time to do it every month. In fact, it's about time for me to change my banner, now that Christmas is over. :) Might as well do it while we're still on winter break and I have the time!
I used to update the look frequently, but I won a blog makeover over the holidays, so I'm hoping to keep my design put for a long time. As far as adding things on the sidebar....I'll be doing that all the time.
As far as others who have asked if it makes sense to pay for a pro layout/design....good designs really do have an impact on the way I feel about a blog, and whether or not I'll be likely to come back. It's strange, but it really makes a difference.
I've had the same layout for my main blog for a while now. It's come to the point where if people see my blog header, they automatically think of me. I don't think I could change it even if I wanted to.
Now, my review blog is a different story. I'm constantly messing with it and having people re-design it. I don't even want to think about how much money I've already spent changing the look. In fact, I have someone re-designing it at this very minute! LOL!
Growing up, you might remember a time in your life when the only thing scarier than the boogeyman was your dentist. Over the years, you grew to appreciate your dentist and his or her service to your dental health, however, it did take you some time to grow into that mentality. Give your kids a…