No matter where you find yourself over the course of the day, you'll be stylishly prepared in a short sleeve shirt and khaki dress pants. For something more on the smart side to round off this ensemble, add a pair of tan derby shoes to the equation. This combination is a fail-safe option if you're scouting for a great, season-appropriate combination. Wondering how to dress appropriately for your age as you head into your 30s? This outfit is the perfect answer.