"How to Win Friends & Influence People" still stands as one of the most prolific books on this topic for decades... Also, my company has weekly Lunch-N-Learns,

"How to Win Friends & Influence People" still stands as one of the most prolific books on this topic for decades... Also, my company has weekly Lunch-N-Learns, I give 1-2 a year on various topics related to writing, testing and deploying software just like I would at a meetup group.