A white sweatshirt and beige shorts are the kind of a fail-safe casual ensemble that you need when you have zero time to plan an outfit. To give your getup a more casual twist, introduce white athletic shoes to the equation. This outfit isn't a hard one to score and it's season-appropriate, which is more important when it's super hot outside. Those who wonder how to dress with style and look good as you make your way through your 20s, you have your answer.