A grey suit and a black crew-neck t-shirt are the kind of a never-failing combination that you so awfully need when you have no extra time to dress up. White low top sneakers are an effortless way to punch up your look. This combination is a surefire option if you're on the lookout for a great, summer-friendly combination. So if you need style ideas on how to dress as you head into your 30s, this outfit is ideal.