Countless coaches, Law of Attraction enthusiasts and spiritually oriented thinkers have advocated cultivating appreciation and gratitude for what you have in your life currently, even as you are looking to greater levels of fulfillment. I agree with this, though perhaps from a different perspective than most.
Appreciation and gratitude gives you a well of positive emotions from which to function in life and becomes an energy gainer for you – as opposed to an energy drainer. In a nutshell, it builds your personal power. With more personal power – a strength of mind and emotions, intellect and heart – you will more effectively face (and over come) the challenges that confront you in life.
You can function from a position of fear, anger, jealousy, etc. if you want. Personally, I find it draining and dis-empowering. How can I expect to stride forth into the world with confidence, assurance and power if I am miserable?
Cultivate appreciation and gratitude for the blessings you can recognize. Build your emotional strength. Greet each day with an ever increasing sense of confidence and energy.
You can accomplish your goals. Claim your current good and watch your good multiply.