Get moving. Exercise doesn't have to mean pushing yourself to extremes in the gym. Do something that increases your heart rate and sounds fun to you: walking your dog, gardening, tennis, sex -- all of these things release endorphins and make us feel good.
Savor the simple things in life. Take note and embrace those every-day simple pleasures in life: the sounds of chirping birds, fresh air, beautiful sunsets.
Stop procrastinating. Spend 15 minutes every day tackling a project or task you've been putting off. Feelings of accomplishment will encourage you to complete other projects lurking on your to-do list.
Surround yourself with happy people. Have you noticed happy people seem to make those around them happy? Indeed, happiness begets happiness. And if you're not feeling happy, act happy. Put a smile on your face. The feelings will follow.
Start a gratitude journal. Count your blessings and write about them. Studies show people who focus on what they are thankful for are far happier than those who don't.
Don't expect to be happy at all times. It's normal to experience the natural ebb and flow of feelings of happiness. It's OK to feel sad or overwhelmed. Those feelings are part of life.
Set goals. In all important areas of your life (physical, financial, professional, home, relationships and fun), set goals and develop plans for reaching those goals. Seek advice from trusted friends and mentors for guidance, and then get started.
Pamper yourself. Carve out time to relax and unwind. Take a bubble bath. Recline in a hammock and read a book. Buy yourself flowers. You deserve it!