Looking to step up your t-shirt game? Try out a tee with a simple pocket on it, it says a little more, "I'm a grown man with killer style," and less, "I just rolled out of bed in this t-shirt." A simple, solid color (white being the most versatile) with a slim fit will look good on anyone. For the more adventurous, a contrasting pocket can stand out well, just stay away from trendy patterned pocket on a solid tee.
Wear it with shorts and boat shoes for day at the beach, jeans for a weekend with friends, or under a blazer for a night out. Not to mention a simple, neutral pocket tee looks great under a leather or denim jacket. To make it all a little more put together, make sure you have a nice pair of shoes, preferably leather and definitely nothing too athletic.
If you're looking for a good pocket tee, check out Everlane (pictured above) for $15 or J. Crew Factory (pictured below) for $19 but is almost always on sale for less.