1. 12 x 12 overlay
2. Photo overlay
On this page I used one of those transparency photo overlays on my main photo... the one with the word CRAZY on it. This overlay is like a pocket and already has double-sided tape on the bottom, so you just slip your photo inside and hey presto it looks fancy. There are various overlays like this now available with Project Life kits too so they are super easy to use on a layout.
Hope that these ideas prompt you to pull out an overlay or two and use them on your page.