I am no longer the most junior member of our department! Now that I am in the "older, wiser" crowd, I see why the information I received was so spotty and random. I tend to tell the new prof all the things I learned the hard way or wished I knew earlier. I am sure I am leaving out tons of useful stuff other people originally told me when I arrived, but don't remember how useful it was because it doesn't stick out in my memory. I bet all the people who helped me out did the same thing.
It is kind of fun to see how far I have come since starting out in comparison!