Excel VBA - Best Practices/Better methods

Disclaimers: I haven't taken any programming classes. Everything I've learned, I've learned from trial & error, asking questions, and visiting these forums. I have plans on taking programming classes (at my company's expense) so I can learn API for a software program that we sell/support. Edit: Just a note, but we do not design the software... we're a reseller.

That being said, I have attached an Excel spreadsheet (zipped). With some code in it. It's done in the format of an NFL standings. There's a button to add data (input byes/wins/losses), and a reset button.

Any assistance for a better way of doing this would be appreciated.