Things Not To Do, Part 1

Don't do this.

     If you don't see the problem, someone else probably takes your wheels off for you.
     If you do this someone else should take your wheels off for you.
     It is great that that tube(the chain or seat stay) is right there for you to grab and lever down the  QR. You know, get it really good and tight up against the stay. But when the time comes to get the wheel off, where do you put your fingers? See? The gap between the QR and the tube is about a 1/4 inch. Not much to work with. If it is tight enough you will need a screwdriver to lever it open.
     In our shop I have a special tool I made called the Mongoose tool. I made it by pulling the seat post out of an old Mongoose we were tossing. It has a perfect lip(The kind only cheap steel seat posts have) for grabbing the end of a QR lever and prying open without damaging the paint like you might trying to pry the lever loose with a screwdriver.
    The other issue is that when you are flat, on the side of a treeless road in July, with no screwdriver and no Mongoose tool, you don't need to add to your hassles by struggling to get the wheel off the bike. That is supposed to be the easy part of a flat repair. Save the struggling for getting that Continental tire off, and then back on, that old Matrix rim(Some of you know what I am talking about, good times)
     Just angle them slightly off the stays(or fork legs). You can still use the stay to tighten and you can get your fingers behind the lever when you need to. If you are really paranoid, you can point them aft so they don't get caught in your teammates(or random little old ladies) spokes.