I find lists of favorite things made by individuals I respect, and strive to think more similarly to, incredibly useful sources of discovery. Here are some of these lists I've used for identifying books to read:
In a similar vein, I've attempted to keep a list of scored and ranked books I've read. The 1-4 rating scale attempts to convey advice I would give to a person like me who has not yet read this book:
4 - Definitely read
3 - Recommend reading
2 - Read if interested
1 - Would not recommend