I have a double light switch that controls the porch light and outlet below but only with only one of the switches. What I want to do is remove the outlet from being controlled by the switch all together and install a single switch. The top switch does nothing so I am guessing it is already wired wrong. Also the outlet only has power when the porch light is on. Therefore, on switch of the double switch is running everything.
First: don't guess: open up the box and see what is wired to the second switch. Second: to provide direct power to the outlet, you just need to move its hot (usually black) wire to the input feed, rather than the output side of the switch.
EDIT: per the comment, I should have made it clear that you're not to wire directly to the switch itself, but rather, via wire nuts, to the incoming hot black wird.
Standard warning: if that isn't clear to you, you should bring someone in who's familiar with wiring rather than risk injury to yourself or the house.