This casual combination of a denim shirt and navy jeans is very easy to pull together without a second thought, helping you look awesome and prepared for anything without spending too much time digging through your closet. For something more on the casually edgy side to finish off this outfit, throw burgundy cowboy boots into the mix. On not so cold days, you can work this summer-to-autumn ensemble and look absolutely amazing. This getup illustrates how to remain stylish as you go into your 30s.