1.
apprenticeship position
9.
self-mastery, self control
10.
strenghthening, intensification
15.
to tackle, master, overcome
16.
to enjoy, as in to have (popularity, etc)
17.
to take care of, deal with
18.
to catch (someone in the act)
19.
someone manages sth, to work out for someone
21.
to get on the wrong path
22.
to relieve one's boredom
24.
to raise, aggravate, heighten