Sit your bike at 45degress so the handlebars are higher than the seat. Undo the lever clamps slightly and rotate brake so that the lever is pointing straight up and down. make sure the line is as straight as possible so no air can get trapped, cut out zip ties etc if required. Undo the screw on the brake lever, insert the hose end that comes with the bleed kit and tape and empty bottle somewhere to catch the fluid coming out, this stuff is bad for grass, your hands and everything else. Fill the supplied bottle with dot fluid, insert over nipple on the bottom, undo nipple and squeeze.
Thats the straight forward part. OK, now there a two options to get your brakes smick.
First is to use two people. Get one guy to push the bottle of fluid from below, when no air comes out get your mate to screw in the screw on the lever while keeping the pressure applied to the squeeze bottle. In this way you are pressuring the fluid inside the brake line so it feels more solid. You cant do this with one person as air comes back into the hose as soon as you let go of the bottle.
The one person solution is to use a big fat arse syringe which will keep the pressure applied while you do up the screw on the handle.
If you want real AWSOME braking, get some goodridge brake lines. I have been using them and they are sick!!!!!