self-improvement 
noun [mass noun]
The improvement of one’s knowledge, status, or character by one’s own efforts: avid for self-improvement, he continued his education after school...
- The book's themes of character and self-improvement were developed from his years swimming for Dartmouth.
- Many faculty members find that the process of developing a portfolio stimulates self-improvement.
- They vary their methods of study and practice in order to discover new strategies for self-improvement.
- shoot one's cuffs
- shoot oneself in the foot
- shoot one's mouth off
- shoot (or kill) the messenger
- shoot-out
- shoot someone/thing down
- shoot someone/thing up
- shoot the breeze (or the bull)
- shoot the sun
- shoot through
- shoot through like a Bondi tram
- shoot up
- shop
- shopaholic
- shop assistant
- shop-bought
- shop boy
- shop class
- shopcraft
- shop-dropper
- shopfitter
- shopfitting
- shop floor
- shopfront
- shop girl