1. Make sure to swallow your coffee before reading some of the responses, you'll spit your coffee out and possibly short circuit your computer/phone/tablet.
2. Apparently if you have an issue with future sister in law, do not try to not invite one of her kids, even if the others do not live in the same house, that's breaking up the family circle.
3. I need to stop talking to future sister in law about wedding plans
4. If it's your second wedding, regardless if you eloped or not, do not wait for a hand out from parents to help pay for wedding or reception.
I'm sure that there is more, but I've already spit out half my coffee this morning. And probably snorted some of it out of my nose too.