Capture One has recently published an article on The Image Quality Professor's Blog on how to create your own Styles and Presets written by Alexander Flemming. Styles are a great timesaver and can help accelerate your postproduction workflow with beautiful color corrections.
Working with Styles is a topic I have been dabbling in recently and have found this article to be extremely useful. I recently reviewed the Spectrum Styles Pack for Capture One which I love for its understated qualities. That seems to be a driving factor with Capture One's Styles, as Flemming mentions in this article.
My only other tip in addition to Flemming's is if you plan on using Styles regularly, create a custom workspace in Capture One that has a dedicated a Tool Tab specifically for Styles. That has helped me recently in utilizing styles more as a finishing tool in making color corrections.
If you are looking for help on how to install an already made style, check out this brief tutorial below.
If you are not already a Capture One user, Phase One offers a free, 30-day trial of Capture One Pro 10 available directly through their website to help you get started.