I discovered watermark stamping as a way to create more visual interest in a page. The great thing about this stamp pad is you can use existing stamps to create a watermark on the page before all the other stuff goes on it.
So this is my message using clear stamps. I chose highly detailed stamps to see how much this actually picks up.
As you can see, all the details show through clearly. I even tried this on white paper and the mark comes out the same as below.
I used VersaMark Oil Based Ink Watermark Stamp Pad, by Tsukineko.