I don't eat a wide variety of foods. I stick with my healthy favorites time and again.
So I rely on supplements to help me cover all my bases, particularly concerning vitamins and minerals.
I also don't eat much red meat, so having a high-quality protein powder on hand helps ensure that I get all my protein in for the day. A protein shake is also a welcome reprieve from eating just chicken, fish/seafood, and egg whites over and over.
I also like using an energy enhancement supplement prior to my workout to help give me a bit of an extra boost for this gym session.
Here's how it breaks down for me over the course of one day: