Some Rules I live by...
1. Spread collar and barrel cuff for suits - french cuff for formal wear only
2. Always working button holes on jacket sleeves
3. Never button the top button of a 3 button jacket
4. Never button the bottom button of a 2 button jacket
5. Pants always with a 2 inch cuff and 15.5 finished width with very little to no break
6. Always double vent (sometime center vent), but never ventless
7. With a suit, always a white pocket square
8. With a sport coat, patterned pocket square in the same tone as the jacket or the shirt - keep it tonal
9. Belt matches color of shoes
10. Sometimes braces and they definitley don't match your tie...
More rules to come...