As I mentioned, Adam picked out some Vinyl Lettering at Hobby Lobby and had the idea of putting a saying at the bottom of the stairs. It was a great idea, and since it was only $35 (plus I had printed a 40% off coupon from retailmenot.com), it seemed like a steal compared to Uppercase Living and other vinyl lettering companies.
However, we did discover that you get what you pay for. With a semi-textured wall and semi-gloss paint, we had a VERY hard time getting the letters to stick to the wall. Even after following the directions and LOTS of rubbing using the tool (and a stronger Uppercase tool), the letters would just peel up every time we tried removing the clear front. We ended up having to painstakingly peel up the clear part in small sections while holding down each corner of each letter with a fingernail or the smoothing tool. It took over an hour to apply and I'm not confident it will stay stuck, but for now, we are happy with how it looks! I am also happy we stayed civil to each other while trying to get it in place (including a "mis-measurement" that resulted in a way-off-center first application attempt).
We must have been paying attention to the "Be Forgiving" rule. :)