I am not suggesting that you give up working hard or looking for good opportunities in life. Go for the good opportunities the Almighty has made available for you, stretch yourself as best as you can to do justice with the talent the Almighty has given you, but never be too obsessed with the idea of achieving success in this life. True success can only come in the Hereafter, where everyone is going to be judged in accordance with his/her sincerity and efforts. Success of this world is always a bonus and a trial in itself.
What I am saying then is that you change the focus of your attention from this life, which can never be fair, to the next one, which is bound to be fair. However, in order for your next life to be successful, you have to do well in this life morally and spiritually. In order for a good moral and spiritual performance, you need to do well with the talent the Almighty has given you. If while using that talent, you achieve worldly success too, thank your God for it. If you don’t achieve much, don’t be disappointed, because success was never guaranteed to you in this life. In the process, if you lose because others in competition are not playing a fair game, you are not, in reality, a loser. It is those who are apparently gaining some worldly success though wrong means who are losing in the real sense. If you can, have sympathy for such people and try to help them understand the fact that what they are achieving in this world in the manner they are doing it is going to cause them to confront lots of difficulties in the next life.
The Qur’an says:
The one who desires the rewards of this fleeting life alone, We shall give him in it what We shall desire, but then We have prepared for him Hell wherein he will fall despised, helpless. And the one who desires the rewards of the Hereafter and strives for it befittingly, and is a true believer as well, the rewards of such a person are never going to be wasted. As for this life, We bestow all – those who are obsessed with the love of this life and those who are striving for the Hereafter – with the blessings of your Lord. And you will not find the grace of your Lord withheld from any of them. See if you want to confirm how We have exalted some over others in this life, but be sure that the life of the Hereafter is far better both status wise and quality wise. (17:18-21)
(Courtesy: http://www.khalidzaheer.com/qa/789)