Meditation tends to work best as a regular practice rather than a one-off fix, and the benefit is usually gradual rather than immediate. If you are in acute distress right now, a grounding exercise or a breathing technique will likely help you faster. Meditation is not a substitute for counselling, particularly for ongoing anxiety, trauma, or depression.
A short body scan to help you transition from work mode to home, rather than carrying the day with you.
References
Goyal, M., Singh, S., Sibinga, E.M.S., et al. (2014). Meditation programs for psychological stress and well-being: A systematic review and meta-analysis. JAMA Internal Medicine, 174(3), 357-368.