Stoicism is more a bunch of philosophical ideas about how to live a happy life than a bunch of fully worked out practices for transforming yourself into someone who can do it. The Stoics were interesting, and more right than wrong, but if I were looking for practical advice, I'd go to the established Buddhist monastic traditions, who have been in the business of training people continuously for some 2,500 years. A pretty rich source for practical advice, and actual daily exercises you can do. (Meditations, prayers, visualizations, all that sort of stuff.)
You don't have to believe in them or subscribe to their nutty cosmologies. But they're the folks who know how to do it. (Tons of value in all the contemplative traditions, really, but the Western ones tend to insist on commitments and affirmations that I can't manage.)