I serge my edges first.. and then I use a 2 1/4" double binding. and i attach it with a 1/4 seam or just a hair larger to hide the serged edge on the front, then hand stich it to the back. I find that serging it helps make them easier for me to handle and they always lay better so I'm not as frusterated with it.
** added**
I also have this thing it's called a "little foot" it's a 1/4 foot that has 1/4 marked before and after the needle position so i stop and start at the correct points for a mitered corner.
Or I hand it to my mom and ask her to finish it! but thats a last resort.