This casual combination of a light blue denim jacket and black jeans is super easy to pull together without a second thought, helping you look awesome and prepared for anything without spending too much time rummaging through your wardrobe. If not sure as to the footwear, introduce white and red canvas low top sneakers to the mix. Nothing like a cool outfit to spice up a bleak autumn day. When it comes to casual fashion tips for 30-something Millennial men, this look is perfect.