I've been using the Headspace app for several months and found it to be very helpful. While doing the exercise, which is a daily 15 minute guided meditation session, I feel much more relaxed. And throughout the rest of my day I find that I'm more aware of my reactions to various events and sometimes I'm able to step outside an emotional reaction and see what I'm doing, and whether it's actually how I want to act, and then behave accordingly. It's no panacea, but I have found it useful enough to keep doing pretty much every day despite the friction which tends to lead to giving up on good habits.
