How to become an optimist

Research shows that life goes better for optimists. I used to be very pessimistic. I am changing. Here's my plan:

1. Limit your exposure to negative things. Seek out positive things.
   
2. Cultivate optimistic friends.
3. Be thankful. Write down one thing a day in a notebook by your bed.
   
4. Exercise. Get some fresh air.
   
5. Persevere. Don't give up. Try a new way. Let go.
   
6. Help others. Encourage them. Compliment them - genuinely.
   
7. Listen to "positive" music. Dance. Sing.
   
8. Laugh! Practice makes perfect.
   

For me the last item is key and I do this by participating in an awesome weekly Laughter Club. What are some of your ideas?