Iran Travel Guide – https://www.travestyle.com/visit-iran-travel-tips/
Escape from Tehran: On the road in a land full of the unexpected (and irony): Road trips around Iran, to places most tours won’t take you.
Iran Dress Code | A Guide on What to Wear in Iran
16 ways to humiliate yourself in IRAN!
8 Things You’d Wish You Knew Before Traveling to IRAN!
How & When to Tip in Iran? (Written before devaluation of the rial, which was 4,000 toman to the dollar, and is now around 50,000).
Persian Food guide | What to eat in Iran?
If you are on Facebook, one useful resource is a closed Facebook group called See You In Iran, https://www.facebook.com/groups/1483860975268043/ which has 140,000+ members, Iranian and Westerners. In order to see the content, you have to apply to be a member (easy), but there are fresh posts every day by people who are thinking about going, and asking for advice, or who just got back and want to report on their experiences. It isn’t 100% reliable – sometimes people post answers that are out of date or just incorrect – but mostly it’r pretty good and very interesting.
Squat toilets: All of our hotels will have western-style commodes, as will many restaurants, museums, etc. But you will probably encounter a squat toilet at some point. I have tried to find a tasteful explanation of how to use a squat toilet, but this is the best I can come up with: https://www.youtube.com/watch?v=fCTKDn3Q8xQ . There is also this, from India which goes into a bit more detail: https://www.youtube.com/watch?v=dKkryfdtMNQ. Also this: https://www.wikihow.com/Use-a-Squat-Toilet.