For a look that's super easy but can be dressed up or down in a variety of different ways, consider teaming a blue blazer with blue jeans. On the shoe front, go for something on the relaxed end of the spectrum by finishing with a pair of navy and white canvas low top sneakers. You're sure to always look stylish even despite the summer heat if you keep this ensemble as a last-minute grab. This getup illustrates how to succeed in the casual fashion department as a teen.