this is about as easy of a diy as it gets.
here are some pics i took today for another member. drivers side headlight, you'll be "tapping" into the green and yellow wire and drivers side, you'll be tapping into the blue and pink wires. you'll see them once you pull back the electrical tape on the 12V connector in the back of your headlight.
if your lights are directional(theyre more to one side of the strip) then make sure you make it to where the lights are facing out. you dont want to have the lights facing the inside of the car.
now, with the LED strips 3m taped where ever you want it on your headlight, with the headlight out and car off and 12v connector not hooked up to the back of the headlight, take the wires from the led strip and put them in the 12V connector just to see which wire goes where. if its the 24" a5 strips from ebay then the red will connect to the bottom and black to the top for both headlights. then once you find out which wire goes where, use the wire taps provided or that youve bought and "tap" into the wire. essentially, the 2nd and 3rd pics is your final product. the first big pic is just showing how to check which wire goes where.