Soldering tips.... i use a weller soldering station with a very fine long pointed tip and i always put the board into a jig, is best to use anti-static precautions (wrist band) and make sure the tip is hot enough but not full on as you will burn the board and melt the pins into the jacket they are encapsulated into, take care here ok.

Scrape away the paint on the earth plain either side of where the usb port was and if you look carefully you will see the pads that the port was soldered on to is so small there is a gap between the pad and the main earthplain, dont worry about this just make sure you scrape enough paint off and apply enough solder to either side, that will make sure it never lifts off the board again.

Do the pins last (on the rear of the port) making sure you have got the usb port lined up correctly with the hole on the case before soldering the pins.

I use a bench magnifier with internal light to work through.