Stress

Tip 1.  Don't. Okay okay. I know it's harsh but if there is room to be flexible with your date, have a think about pushing your event back to allow time to plan. Planning without sufficient time means stress, lack of vendor availability, etc etc Obviously...

Main speaker doesn't find the conference venue,  wedding photographer falls ill a day before the wedding, the DJ for the surprise 30th party is running late, it starts raining the day of the garden party!   With all the dependency on other people and reliance...