How do you prep for IUI?

I'm just finishing my Letrozole from CD 2-6, going in for my first <a href="https://glowing.com/glow-fertility-program">IUI</a> this cycle! What do you do to prepare yourself for it physically and mentally? Any foods/teas that you recommend? Yoga, stretching, meditation etc. 
Also what's the process like? How long does it take etc?