<p>LOL
It depends on which areas he’s interested in.
Computer science - a must-know “self-improvement”, can be very handy and useful!!!
English - literature analysis, writing skill, a way to relieve stress…
Music, like English…</p>
<p>Check out here…
[Anthropology</a> - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Anthropology]Anthropology”>Anthropology - Wikipedia)
it mentions some sub-branches of anthropology study…</p>