One of the hardest things I ever learned as a faculty was how to work with a tech. It was doubly hard when I was young, and the people with whom I was working were within 5 years of my age. Finding the balance between friend and employee, supervisor and colleague. Its not something for which we get trained.
As is true of trainees, the most important thing may be respect. Recognize that this is another human being who is both different from you and still shares all sorts of stuff. Its Scylla and Charybdis all over again. Bluish-yellow. For lots of women I know, it has often worked better to veer towards the professional end of the spectrum and away from the "we're all friends in this lab". I have found that getting sunk into the inevitable personal problems that all of us have, that younger folks wear on their sleeves, can upset the flow of work in a lab. For lots of guys, the professional /cold/hard attitude can send the message that you are merely a pawn or stepping stone on my path to greatness.
This is a person who works both with you and for you. That's the balance problem. You have a job. You have a task. You have a mission. Your job and task and mission has short term and middle term and long term parts. A person, a non-trainee person, working with you and for you is going to contribute to all of those parts. They don't have to know everything, but if you treat them like a cog and tell them "what they need to know" they will not be invested in your work. They won't have loyalty towards those goals, let alone to you.
I can't tell you all the small specifics of what to do. In fact, understanding the overarching principles is probably a better guideline. Treat the people who work with you as you would want to be treated. The rest is just NIH funding.