1) It was narrated from Abu Mas'ood that the Prophet(peace be upon him) said: "Whoever recites the last two verses of Soorat al- Baqarah at night, they will suffice him." (Al-Bukhaari, Muslim) Ibn Al-Qayyim said in al-Waabil al- Sayyib (132): They will suffice him against any evil that may harm him.
2) There can be no doubt that laughing too much affects the Muslim's heart, distracting one from thinking deeply and feeling fear of Allah. The Messenger (peace be upon him) warned us about the danger it poses: "Do not laugh too much, for laughing deadens the heart." (Narrate by al-Tirmidhi, Ibn Majah)
3) Regarding trials: Victory and success cannot be achieved except after tests which will bring the good forth from the evil and tell the believer apart from the kafir. Allah says: "Allah will not leave the believers in the state in which you are now, until He distinguishes the wicked from the good. Nor will Allah disclose to you the secrets of the Ghayb (unseen)." [Aal Imran 3:179]
4) Based on the hadith in Bukhari and Muslim: On the night when the Prophet (peace be upon him) was taken up into heaven (the MMi'raj), Allah initially enjoined fifty prayers to be performed night and day. Then the Prophet (peace be upon him) kept asking his Lord to reduce it until it became five prayers to be offered night and day. But Allah decreed that whoever prays the five prayers will still receive the reward of fifty prayers.
5) Allah is close to His slaves. He sees where they are and He knows their situation. He hears what they say and responds to their du'aa'. Nothing about them is hidden from Him, as He says (interp. of meaning): "Truly, nothing is hidden from Allah, in the earth or in the heavens" [Aal Imran 3:5] Allah alone is the One Who has created us and Who provides for us; in His hand is the dominion and He is Able to do all things.