Although you don't specify gender, I'm a dude, so I'm going to pretend you are too. Here's my three step suggestion:
1) Go through your ties.
2) Find the one that you're pretty sure won't wrinkle if you jam it in your pocket.
3) Jam it in your pocket.
You're all set! 😀
Remember, these are psychiatrists. My wife already makes fun of me and says I should be buying "psychiatrist sweaters." I already grew a beard and found some nice nerdy glasses, and that's all the uniform I can muster for the moment.