"3. Gross generalization, but $150 shoes last more than twice as long as $75 shoes. Hit up somewhere like Nordstrom Rack for good shoes. Same principal applies to belts."

In particular, I'd recommend cole haan shoes with the nike air stuff built into them. They're amazingly comfortable.

"5. Don't feel compelled to use those little plastic collar points." The metal ones are quite nice and can help keep up a shirt's appearance over time.

"If you wear a tie, strongly consider a jacket." I disagree. Shirt and tie is just fine. Jacket can absolutely make it better as can vest or sweater; however, no biggie if not.