Spend a few dozen hours finding and vetting "best" lists, deeply evaluating their quality. Read Web forums. Construct spreadsheets with meta-rankings derived from the lists and posts you've found. Form strong opinions about the correct ranking of the books. Argue on Web forums about the books. Post your own best list. Argue about it with people who are clearly idiots if they can't see your list is correct.

... uh, what was I doing again?