How do you decrease stress or your own reaction to stress?

I recently finished a very stressful activity at work. I had days when I was overwhelmed by my reactions to the stress of this 3-week-long activity, but I made it through. I used a variety of actions to help myself. I exercised. I meditated. I used deep breathing techniques. I used some mindfulness techniques, and I used traditional therapy. All of it helped, but there were still days that were painful.

What techniques to you use to either combat stress, reduce stress, or lessen your own reaction to stress? Concrete techniques are appreciated.