Hmmm... Feel free to add your own P's as you please as it is a joint endeavor but personally I'd be more inclined to add "Pupil" than 'prentice. I did find "pupil" under the synonyms though?
Precious? I don't know. It's descriptive rather than action oriented or it attaches high value. I personally stay away from stuff like that. The origin/main premise of the P's was to steer, assist and compliment goal setting and personal growth.
Maybe too I'd consider adding prepared or preparation. Sort of hijacked this thread, but Friday's participating so guess it's okay?
Added in edit: Oh crap, I have a duplicate. Will have to dig around and try to fix it, potential is twice and either I'm missing one or I miscounted..
Added in 2nd edit: Okay left off the "pupil" but took up too more to bring it up to an even 20 for now though more may surely follow and did a first edit of shuffling them around a bit... will now take it too my diary but here they are:
The 20 “P”S: Presence, perception/perceptiveness, perspective, potential, patience, planning, purposeful (aka meaningful), preservation(istic), prepared/preparedness, prudence, positive, proactive, priority/prioritized, practice, persistence, perseverance, pleasure(ful), peace (or peaceful), prosocial, and prayer (???)