best way to wire single sub

series or parallel? cause wouldn't parallel burn up the amp... while series would only give me an 8 ohm load... (im learning so be patient with me)

your manual will tell you how to hook up your speaker wires to the amp.   

Basically you combine the left and right channel together to power one speaker.  Say  you had an amp that was 50x2 rms @ 4 ohms, 100x2 rms @ 2 ohms, and 200x1 bridged (at  4 ohms).  Bridged and stereo @ 2 ohms are the same thing in terms of ohms to the amp.  What you are doing when you bridge is take each channel's power @ 2 ohms, which is 100 watts rms and combining them.  Overall, the amp will see a 4 ohm load which is fine.

Is your sub a single voice coil or dual voice coil?  Your first post implies it is single, but your second implies it is dual.  If it's a single voice coil 4 ohm sub, simply connect it to the brigded terminals (4 ohms bridged).  If it's a dual 4 ohm voice coil sub, wire them in series and connect it to the bridged terminals (8 ohms bridged- electrically the same as 4 ohms stereo).  Do not worry about achieving 4 ohms bridged, just hook it up first and see if you like it.  If you don't, then your options are listed below.

If it is a dual 4 ohm voice coil sub, in order to achieve 4 ohms bridged, you'd purchase another of the same sub, switch to a single voice coil sub, or switch to a dual 2 ohm sub and wire the voice coils in series. 

Do not only connect one voice coil to achieve 4 ohms.  That would cut the power handling characteristics of the subwoofer in half.