2 o'clock depends on what side you are looking at...I would just say your starting foot should be forward of 12 o'clock. I agree...pushing off with the unclipped foot often causes slipping - do this carefully. I've also found that "ratcheting" your clipped in foot works pretty well. What I mean by this is push your clipped in foot down to the 6 o'clock position and then back-pedal (pull the pedal back up) to the 12 o'clock position and push back down to 6 o'clock. I find this easier than trying to pedal a complete circle when just starting from a complete stop. Doing this once usually give me enough forward momentum to clip the other foot in and pedal off. If you do try to pedal with you unclipped foot be very careful. On more than one occasion my foot has slipped off the pedal doing this and almost sent me off the bike. Hitting yourself on the top tube is not fun - man or woman!
As we must account for every idle word, so must we account for every idle silence." ~Benjamin Franklin