How often do you use the services of the US Post Offices for sending mail/packages?

This question comes on the heels of the recent question about the demise of the US Post Office. One Flutherite answered that he never uses the post office for mail, bills, etc. I thought of my own usage: Christmas cards, birthday cards, occasionally a letter or two here and there. I don’t use UPS or Fed Ex because USPS is way cheaper.

I started wondering about other Flutherites and how often they may use the services of the Postal Service to send (I know we all receive mail so it’s a given that everyone receives mail).