What makes Renee Zellweger most proud in her celebrated acting career is that she's kept her sanity.

"It's weird to have fame precede you in any situation ... and I'm very proud of myself that I've not been to Betty Ford (Center) yet," Zellweger, 38, tells Harper's Bazaar. "Never say never!"

Among her career achievements? "Learning what my boundaries are. That I've been able to stay out of the psychiatric wards despite the really bizarre exchanges I have on a daily basis," she says in the magazine's December issue, on newsstands Nov. 20.