(This post contains affiliate links.)  When you’ve got as many kids as we do, it’s an endless party. No, really. We end up celebrating a birthday just about every single month of the year, which takes a lot of planning. While I’m good about many of the details, one thing I tend to fail at is sending thank you cards. They’re important. I think it’s good etiquette to send them.  I was apparently traumatized by having to write 153 thank-you wedding cards (you know, the boring plain white ones with standard wedding photo) & never recovered, which has affected my ability to get on top of sending out thank you…