For some reason I always thought that Allah rewards us only in the Hereafter, that nothing in this life should be seen as a reward, but only as a test, from Allah. But the Quran says otherwise. The Quran tells us that Allah will reward believers in this world, in addition to the greater rewards that He prepares for them in the next one. An example is the case of Prophet Yusuf 'alaihis salam (peace be upon him):
And when Joseph reached maturity, We gave him judgment and knowledge. And thus We reward the doers of good.
And again regarding Prophet Yusuf:
And thus We established Joseph in the land to settle therein wherever he willed. We touch with Our mercy whom We will, and We do not allow to be lost the reward of those who do good. [Quran 12:56]
Allah subhanahu wa ta'ala (Exalted and High is He) tells us that He does not forget to reward good deeds, but the topic here is Prophet Yusuf's knowledge first, and second his worldly status in Egypt. This shows us that Allah subhanahu wa ta'ala does not keep all of our rewards for the Hereafter. Realizing this Truth is a good protection against hopelessness and the Shaitan-inspired feeling that Allah has abandoned humanity na'udhu billah (we seek protection from Allah). Allah subhanahu wa ta'ala is always there, ever watchful, rewarding those who do good deeds with His infinite blessings and mercy.
Another example is Prophet Musa 'alaihis salam:
And when he attained his full strength and was [mentally] mature, We bestowed upon him judgement and knowledge. And thus do We reward the doers of good.
Thus those who seek Allah's pleasure and the rewards of the Hereafter are rewarded with knowledge and high status in dunya (worldly life). Allah does not leave the believers to fend for themselves, unsupported and under the whims of dunya, rather:
Indeed, We will support Our messengers and those who believe during the life of this world and on the Day when the witnesses will stand
This point is made stronger when you realize that everything good in this life has been made specifically for the pleasure of the believers.
Thus if you believe in Allah and make Allah your primary concern, nothing will have the power to cause you to worry in this life, for you will be under the 24/7 support of Al-Qawwi Al-Mateen (The Lord of unbreakable might) insha'Allah.