An excellent book on how to execute strategy by John Doerr
This is the ultimate guide on OKRs (Objectives and Key Results). OKR is a system to deploy and measure strategy. This book should be the starting point for any organization wishing to implement OKRs, as it’s written by the person who made it popular (it was first conceived at Intel, where Doerr used to work).
Here are some interesting videos to get you started on OKRs (or at least motivated):