Blog Accessories

I designed my own blog set for this blog www.armyknightslady.blogspot.com. I might want to redo it with the same pictures a little later (or now) but I know I need a button and a sig tag. Can anyone recommend designs for these for me? Should I stick with the Army theme or is it okay to not have too much matchy matchy? I like the Army Theme but I also like tulips. I like Simple with just a simple name design with a small graphic and some added basic info.. I don't know I am so confused! I would even do a normal picture tag. What do you suggest? Where did you get your blog graphics?