I took an old large picture frame that I had actually put in the yard sale last year. Thankfully, it didn't sell because now I needed it. Sorry, I don't have a before picture. I was spray painting and too lazy to go upstairs for the camera.
I started by painting the glass (big fail). I had read some where to paint the glass, but then once I wrote on it, the paint rubbed off. The words on the board should be "Craft, Craft, Crap!"
I took the backing of the frame and painted on three coats of chalkboard paint. I did two coats in one direction and one in the other direction. This helped to hide any lines. I got my paint from Walmart in their paint section. Don't buy it from the craft section! It is about a fourth of the size and more expensive. The one I bought was around $6. Here is a picture of the paint I used:
Then put your board in the framing and voila! You now have a great chalkboard to use for anything in your house! I considered putting some vinyl on it, such as, "To Do." I am not sold on it though. I would like to keep the frame for writing anything on. I can't wait to start writing special things on my board, even if it is just my to do list.