Quick Fix: Bach Flower Rescue Remedy - a blend of 5 flower essences that promote clarity, relieve stress, aid in coping with trauma, and quickly calm you down. I love this stuff- I put four drops under my tongue and it works great.
Daily Dose: Rhodiola Rosea- this is an adaptogenic herb that you can take every day. It helps your body adapt to stressful conditions. A great source of information on this herb is the book Rhodiola Revolution.
Long-term commitment: Ultimately to reduce the stress and exhaustion in your life you must change your lifestyle. A way to begin this journey is to exercise. I love to do yoga. I don't do it as often as I would like, but when I do it I feel so much better! The website Yoga Today puts a free class on the web every week. It's a great way to be a part of a class if you can't afford to go somewhere.
So breathe deeply, drink a glass of water (and maybe a cup of coffee :), and try these tips next time you feel stressed. Have a lovely day.