If there's one thing I would take from all I have learned that has gotten me to where I am today it's to be grateful. Be grateful for even the tiniest of things. One of my very favorite authors and speaker, Wayne Dyer (God rest his soul) taught me something about being grateful. Being grateful is EVERYTHING! Each morning when he would get up, his routine was to step one foot at a time and say "Thank (one foot down) You (next foot down)". This made absolute sense to me, why not be grateful for waking up in the morning? When you get somewhere safely, say thank you. When you land that new job, be thankful! When you think of all the obstacles that have gotten you where you are today, be thankful.
Write a list of positive and negative things you have encountered that have made an impact on your life. THink of how you can be grateful for each and every one of them. Without them you wouldn't be where you are today.