Although there is (of yet) no ‘cure’, I’ve found medication (which I’ll on until the day I die unless they do find a cure) reduces the severity of the ups and downs, and cognitive behavioral therapy really makes you see yourself, and your place in life, in a whole new light.
I’ve also attended a course for understanding and managing the illness and another on improving self confidence. Both were enormously helpful as was meeting other sufferers and sharing stories with them.
Edit: I’ll just add that overall (yes, I still have bad days, and sometimes suicidal-ish thoughts) I’ve never been happier, and I’m sure I’m happier and more content than most people including those without a mental illness.