I'm trying to build credit with my first credit card, what purchases should I make with it?

• credit card apps
• online credit card application
• us bank credit card processing
• transfer credit card balance
• build credit with secured credit card

I was told by the lady at the bank to use it for only big things, like if I bought a laptop or something. But I don't buy things like that too often. My APR is 16.99%, what would be the best kind of purchases to make to help me build credit?

I'm trying to build credit with my first credit card, what purchases should I make with it?