I totally agree with everything above. As far as the phraseology goes, I think the safe thing to do when there are other aircraft around you is to just stay put and call "ready for departure, in sequence."

ATC should then give you your sequence and will tell you when you can pull up to the hold short line.

This way you won't aggressively cut into a jet taxiing straight for the hold short line or leave the run-up area at the same time as another GA aircraft.

Be safe out there!