Adding gadgets to your blog can make it more interesting. I added a gadget that was Inspirational Quotes. Everyone needs a little inspiration or motivation everyday.

My personal favorite quote is "Do not drive faster than your guardian angel can fly."

You can add games, or just simple things like pictures for the gadget.
If you are on your own blog, in the top right and corner is design, clock on that and then on the left side there is a list of where you can go. Click on layouts and then add gadget. It will give you tons of things you can choose from to put on your blog.