At the risk of getting severely flamed:
I would stay away from first gear wheelies until you are more comfortable with the bike on one wheel. They have more of a tendency for things to go wrong, ie bike going over backwards. The best results can be obtained by getting the bike to aroud 6k rpms in 2nd gear (40 mph), load the springs a little (rear brake or bounce it up), clutch in (blip the clutch just long enough for the engine to rev up) rev to about 9-10k rpm, release clutch and stay on the throttle to ride out. This should be a quick and smooth action taking a matter of about 2-3 seconds for all above actions. She will come up in 1st, 2nd and 3rd no problem. Make sure you keep the rear covered in case it get hairy and/or be ready to grap the clutch. I never used the rear brake to load the springs cause if you apply to pressure you could end up with just a spinning tire. Shift of weight a little foward while doing the above (ie bouncing) has the same effect.