If you want to be well-informed and experienced, you have to read a lot and travel a lot.
Tips
history
From Feng Menglong's 《古今小说》 (late Ming): in matters of marriage, the older women of a great household are 见多识广 — they've seen more than the men. A genuine compliment with no irony.
usage
Compliments breadth more than depth — somebody who's been around, met many kinds of people, and learned from it. For deep expertise in one field, 学识渊博 (xuéshí yuānbó) fits better.