Change work/life balance or reduce the workload
Change jobs
Reduce the number of stressful tasks
Solve Problems
Develop relaxation strategies
Re-allocate tasks or responsibilities
Stop arguing with people
Develop helpful resources
Improve skills
Develop a more controlled environment
Bring in support
Take rest or break periods
Try physical exercise or sport (Judo is excellent for relieving stress because of muscle tension and relaxation).
Talk to people who can help who are able to distance themselves from the situation.
Learn to say no
See the task as a challenge rather than a chore
Involve people that help, exclude people that hinder
Consider seeking professional help in managing stress.

Note:
Take time to deal with the effects of stress before trying to move on.  The time will vary depending on the circumstances.