One of the best ways to maximize the benefits of caffeine in coffee is to pair this with 25-100mg of L-Theanine.
L-Theanine is a non-essential amino acid that is relaxing but non-sedating. This means it will help you relax but won't knock you out cold. L-Theanine is most prominently found in Green Tea but is widely available as a supplement.
Pairing L-Theanine with coffee/caffeine helps take off the "edge" and is one of the most popular nootropic (cognitive enhancing) stacks. For many, it produces a calm, centered focus which is preferred over the often jittery feeling of caffeine alone.
For more information about L-Theanine including references to over 65 scientific studies, check out https://examine.com/supplements/theanine/ or (as always) feel free to reach out to me if you have any other questions.