I watched a documentary about happiness and wrote some notes on points that I found useful towards my own happiness.
Experience "flow" regularly. Flow is the mental state of operation in which a person performing an activity is fully immersed in a feeling of energized focus, full involvement, and enjoyment in the process of the activity.
Recover from adversity quickly. If something bad happens to you or affects you negatively, don't sulk in those bad feelings for too long. It leads to depression, resentment, bitterness, and all those other long term emotions that are harder to remove from your heart.
Connect with nature. It's peaceful, natural, and inspiring.
Have a close support system. Keep good people around you that truly support you, what you feel, do, believe in, and think.
Be intrinsic goal-oriented. Instead of wanting more money, higher status, and nicer things, seek to deepen your relationships with people, help those around you, and make the best of what you have.
Don't overwork yourself. Working 80 hours a week to pay off that car and mortgage is not worth the emotional damage you are putting yourself through.
Cook meals in bulk. You can cook just once or twice a month to save tons of time and money if you enlist the help of some trusted reliable family and friends. This is great for relieving stress (don't have to worry about how you are going to provide meals every single day), allows you more time with the people you love, and eases some worry about your finances.
Build community. How close are you with your neighbors? With your coworkers? Don't isolate yourself, reach out.
Share. You know what you want from others. What do you have that you can share? You can make a huge difference in someone's life just by sharing your time, attention, and love. Things that are worth more to someone than anything you could possibly purchase for them.
Let go of prejudices. Stereotypes, racism, religious hate, and political differences all make people feel so divided. When you break down those walls that divide, you realize that we are not much different from each other. We connect as the human beings that each and every one of us are.
When someone becomes sick or is in need, run to their rescue. Delaying will only leave you feeling guilty, bewildered, disconnected, and sometimes even awkward. Even if they don't appreciate it, you did the right thing.
Meditate on compassion and loving-kindness. Focusing on these values will do wonders for your emotional well being.
Count your blessings at least once a week. Pick a day out of the week and write down or note at least 5 things for which you are truly grateful for. Doing this regularly actually increases your overall happiness compared to not doing it at all.
Help others in acts of kindness. Every opportunity you can, find a way to make someone smile, give them a hand, or simply make their day. Their joy will increase your own tenfold.
Care about something bigger than yourself. It could be the church you belong to, the military branch you belong to, the band you are in, the humanitarian cause you support. Be a part of it and do your best to support the group.
Be authentically you. Your unhappiness increases the more you deviate from being who you truly are. Even if you are unsure of your own identity, make yourself comfortable when you are around others. Being true to yourself leaves no room for self-judgement.