Surah Az-Zumar. A beautiful surah with so much information. Plus the thing is, it's very clear. Very.
http://quran.com/39#0
(you can listen and follow with the interpretation and meaning there.)
I love reciting Surah al-Fajr. It showed how selfish and unthankful a human can be to his Lord. SubhanAllah, what an attachment we can have to this world...
89:15. As for man, when his Lord tries him by giving him honour and bounties, then he says (in): "My Lord has honoured me."
89:16. But when He tries him, by straitening his means of life, he says: "My Lord has humiliated me!"
89:17. Nay! But you treat not the orphans with kindness and generosity (i.e. you neither treat them well, nor give them their exact right of inheritance)!
89:18. And urge not one another on the feeding of AlMiskîn (the poor)!
89:19. And you devour inheritance all with greed,
89:20. And you love wealth with much love!
89:21. Nay! When the earth is ground to powder,
89:22. And your Lord comes with the angels in rows,
89:23. And Hell will be brought near that Day. On that Day will man remember, but how will that remembrance (then) avail him