While each person is different and has different events and issues that cause stress, there are some issues that almost universally affect people. These are the stressors you most want to understand and take measures to prevent. 

• Feeling out of control
• Feeling direction-less
• Guilt over procrastination or failing to keep commitments
• More commitments than time
• Change, especially changes you didn’t initiate or institute
• Uncertainty
• High expectations of self.

Here are some ways to get stress under control. 

• Control time allocation and goals. Set realistic goals and time frames for yourself. 
• Reconsider all meetings. Meetings should only happen when interaction is required. 
• Control your time. Make time for the most important commitments and take time to figure out what these are.
• Make time decisions based on analysis. Take a look at how you currently divide your time. You need to spend the majority of your time on items that are important and/or urgent.
• Manage procrastination. Deal with procrastination by breaking the large project into as many small, manageable, instant tasks as possible.

From Susan Heathfield about.com