A thought for those of you heading off to start grad school: You may feel the need to posture in front of your new colleagues to show how awesome you already are. Get over that impulse and find people with whom you can share feelings of how lost and overwhelmed you all will be.
This is the best piece of advice for people starting #phdlife . Also, for those who have been there a while, do talk about #failure not just your big successes. It will really help those starting understand that it is ok and normal to fail.