Yes, I practice meditation, and I find it has a significant impact on my training.
My practice is mindfulness, from the Tibetan tradition - not an intense focus, but a relaxation and noticing. Mostly I notice my body and posture - which of course translates immediately into awareness that is useful on the mat. Habituating the mind to remain relaxed, alert, aware of a broad field of vision (field of perception) without being fascinated by any one thing within it (or being willing to gently drop the fascination as it is noticed) is good practice. Being well practiced in that is enormously helpful when training.