- "The Defining Decade: Why Your 20's Matter and How to Make The Most of Them Now": it motivated me to find a fulfilling a career in tech (among other things).
- "On the Shortness of Life" (Seneca) - Really made me take a hard look at my life, for the better.
- "Eat and Run" - Interesting read about an Ultramarathoner. Inspired me to find the motivation for doing "tough things" in general.
Being 31, still feeling lost, this title stresses me out
[1] https://www.quora.com/I-am-in-my-late-20s-and-feel-I-have-wa...
Long answer: the sooner you read it the better, but any time is better than never. There was a great metaphor early in the book, actually. I don't have a copy on hand so to paraphrase: your life is like a cross-continent flight. If you want to change your destination, earlier on is better--the plane need only make a slight adjustment at the beginning to alter its trajectory significantly. Closer to the end, and you gotta make a pretty sharp turn.
It's not the perfect metaphor but for me personally it really resonated.
Especially if you're fairly happy at your late 20's, any adjustments you might discover you want to make probably aren't that far off :)
So if you felt fairly happy chances are good you’ve made good choices. It may be worth a read for anything you’d like to tweak