One of the best ways to ensure that you get enough of all the Vitamin B complex vitamins is to take a Vitamin B supplement every day. Look for a natural Vitamin B supplement sold at quality health food or natural food stores, and look for a vitamin B supplement without added fillers or starches.
If you enjoy energy drinks, you may be getting enough vitamin B already, as it is often added to these drinks, so check the label for the vitamins it contains. And remember that alcohol can keep your body from using Vitamin B (and other vitamins) effectively.