TIME Magazine tells you how to take good selfies [video]
time.com
time.com
As an aside, makes me wonder if there isn't an opportunity to make an app that takes like 50 selfies and selects the best one for you (or just ranks them for you). Like it continually takes photos for 60 seconds and you turn so the light hits you at different angles and it auto-applies Instagram-like colour correction etc.
If Google can apply deep learning to recognize cat pictures in YouTube videos, I'm sure it's possible to assign a score to each of 100 burst-mode photos and rank them to find THE BEST SELFIE OF ALL TIME! :)