1) Believe everything happens for a good reason.
2) Use Affirmations and affirm "I am an Optimist person" as much as possible.
3) Do Meditation daily, as it will delete the negative imprints in the sub-concious mind.
4) Read Motivating, Inspiring, positive mental attitude books.
5) Listen to Inspiring and Motivating Audio books.
6) Attend life transforming positive workshops.
7) Be surrounded by optimistic and uplifting people.
8) Be Optimistic in every situation.
9) When something doesn't happen, believe something better is coming on the way.
10) Avoid watching News.
11) Avoid reading Newspaper.
12) Avoid watching Drama in TV.
13) Be a member of an Optimistic group like "The Happy Zen".
14) Believe in God and do prayer daily.
15) Love everyone including "You" unconditionally.
16) Forgive everyone including "You".
17) Live in the present.
18) Do every work with love and passion.
19) Smile at strangers and friends often.
20) Help others and be compassionate.
21) Remember no one is perfect and it is "OK" to do mistakes and fail.
22) Sing your favourite song.
23) Dance
24) Read positive and inspiring quotes. Even a single word can change your life.
25) Eat Healthy food
26) Do Exercise.
27) Play some sports.
28) Spend at-least one hour daily for the thing which you love.
29) Whenever Negative thought comes, write it in a paper and tear it.
30) Ignore what other people think about you. Do Good. Be Good. Think Good.
When Edison is asked about the failure during the invention of electric bulb, he replied Optimistically, "I have not failed 10,000 times. I have just found 10,000 ways that won't work". In a nutshell, there is nothing called as "Down" or "Failure" in life. It is your perception and attitude that defines it.
"Watch your thoughts, they become words.
Watch your words, they become actions.
Watch your actions, they become habits.
Watch your habits, they become your character.
Watch your character, it becomes your destiny."
Change your perception and attitude, you change your life. Stay Blessed and Happy positive thinking.