|Unless you're applying to be a prostitute|
don't dress for the job you want.
Now if this saying were “Dress for the job you’re applying to” then I might not have as much of a problem with it. However that can still be a misleading piece of advice because if you’re applying to McDonald’s or a gas station you should dress a little nicer than that.
Another problem with this saying is it’s difficult for most people to actually do. If you want a great job and you’re broke, you can’t always dress as fancy as the job you want. Dressing for the job you want is right up there with companies only taking applications from people who are already employed. It’s just not right.