Use the floor jack the support the suspension by jacking up the A-arm.
Undo the bottom 2 strut-to-steering-knuckle-nuts and the 3 nuts holding the strut in place inside the engine compartment. It is also a good idea to break the Strut mounting nut (the big one in the middle of the strut) free before you take the strut off the car.
Updated: It was suggested that using a torque wrench as a breaker bar is not a good idea if you like to keep your torque wrench accurate and serviceable for a long time.
Once you have all the nuts off, maneuver the strut out from the bottom (be careful NOT to break the ABS cable, it will get in the way and you're better off to have help from someone.) The strut assembly is quite heavy (about 30 lbs) but if I can do it myself, so can you.