I know we often look down on the mushy stuff in engineering - but most of all, be kind. It's surprisingly easy to crush people without meaning to, particularly when they look up to you.
My current manager (who I greatly respect) is awesome at handling this; when I fuck up, he'll come over smiling, and tell me a tale of how he did something similar (only worse) whilst helping me fix the situation. The tale could be a lie for all I know, but it always instantly puts me at ease.