Can I Get This?

I am the worst person in the world at thank-you notes. It takes me months to write them. I get nervous about what I'm going to say and how I'm going to say it, and I avoid it for as long as possible. Sometimes they don't even get done. I have no idea what's going to happen if I get married someday and lots of people give me really nice presents. Can we just say a stamp-on-a-blank-card is an acceptable form of thanks?