Use a Soldering Iron
This guide will show you how to use a soldering iron.
Wet the sponge
This will allow you to clean it off when you get a lot of burnt solder on it
Turn on the Iron
This will just help you, well, melt the solder
Clean Clean Clean!!
I cannot stress how important it is to clean the iron, or it will corrode and be useless, clean it up!
Tin the Tip
This is where you put solder on the iron for better heat flow and a cleaner tip
Now for the soldering
Put the wires together or parts in the board, and solder the two together
Clip the leads
This will allow for the next step to be easier
This is the fun part. But be careful, the flame is hot and you can burn yourself!
Turn off the iron.
This will keep it from burning itself out.