1. Do in-domain search and out-domain search
start do things in one aspect and become the expert in this aspect
if I wanna do something in CS, see how this thing is done in other aspect
2. why:
what: define your own problem
how: it‘s important to convince others why you want to solve the problem in this way
compare with the methods that others solve it
so what:
How present my research better
原文：http://www.cnblogs.com/sumile123/p/4786907.html