3 things, in the following order, will increase your quality of life...
Treat yourself well. I.e. flow states (see post When in Doubt, Go find Flow), physical activity, and quality nutrition. Happiness is found through self-awareness. Be conscious of what you have and enjoy this thing we are doing (human-life).
Surround yourself with good people, this is very important to maintain a sound mind. Don’t hang around people who don’t believe in you for too long, or you may find yourself beginning to believe them.
“You are the average of the five people you associate yourself with the most” (This I believe is a universal truth)
Treat others respectfully, and do things for others with no expectation of getting anything in return. Show kindness, gratitude, and love to other people and you will be intrinsically rewarded. I have said this before; I genuinely believe most people don't have a clue what they are doing. Assume that the majority of people you meet are simply trying to do the best they can with the cards they have been dealt. Those that live mindfully are in the small minority. Marcus Aurelius once said:
“Say to yourself at daybreak: I shall come across the meddling busy-body, the ungrateful, the overbearing, the treacherous, the envious, and the antisocial” (Meditations 2.1)
It is true that you will come across unpleasant times and people. This is not in your control, yet how to treat people is. So, be mindful of the energy you are giving off and how you are treating others. Your perceived well-being in this life is better when you do good to others (This I believe is a universal truth).
Those who gain great wealth in this life consistently reference the invaluable characteristics of meaningful contribution. Even for those who have all the money in the world, doing well to others still remains a top priority. There is something about that that is significantly revealing about the human conditioning.
Life is what you think it is. If you want to put a dent in the universe you can. If you work hard, you are capable of accomplishing remarkable things. We know that luck is when preparation meets opportunity. Preparation is hard work.
It is very fulfilling when you work extremely hard and accomplish something. Often, we don’t get what we worked incredibly hard for but we are undoubtedly stronger and smarter for engaging in the process of hard work. Good things happen when you work really hard (This I believe is a universal truth).
“Once you say you are going to settle for second, that’s what happens to you in life”
Do what you love to do. It is easy to live a conventional life and it is comfortable to blend in. It takes courage to step outside the norm and trust your gut. So do just that, trust your gut regardless of what is the ‘norm’. Personal growth, in the best way, happens only outside of your comfort zone. Your life, like mine, is too short to spend it blending in, being safe, and living for someone else. Be true to yourself. Do not make your life decisions based on what is easy, simple and safe. You got one shot at this thing, so take it and run with it and don’t look back.