What is the key to happiness?

Wikipedia states: Happiness is a mental or emotional state of well-being which can be defined by, among others, positive or pleasant emotions ranging from contentment to intense joy. Happy mental states may also reflect judgements by a person about their overall well-being." 

Is there actually a key to happiness? I tend to believe there are many keys that lead to happiness and ultimately....... joy. Take a moment to track the 

• Times, 
• Places
• People you associate with your happiest moments. 

Where were you? What were you doing? Who were you with? Once you explore these questions, you may find some patterns and opportunities to recover this mindset. What you may discover are the elements that make up happiness for you. These elements are opportunities to either ignite those same times, people and places of happiness or invent new ones that will instill new happiness moments. Finally or shall I say ultimately, we are all responsible for our own happiness.

If you are expecting someone else to make you happy, It may be a long and futile wait.