'Abdullah b. 'Umar reported that Allah's Messenger (may peace be upon him) said: Three persons set out on a journey. They were overtaken by rain and they had to find protection in a mountain cave where at its mouth there fell a rock of that mountain and thus blocked them altogether. One of them said to the others: Look to your good deeds that you performed for the sake of Allah and then supplicate Allah, the Exalted, that He might rescue you (from this trouble). One of them said: 0 Allah, I had my parents who were old and my wife and my small children also. I tended the flock and when I came back to them in the evening, I milked them (the sheep, goats, cows, etc.) and first served that milk to my parents. One day I was obliged to go out to a distant place in search of fodder and I could not come back before evening and found them (the parents) asleep. I milked the animals as I used to milk and brought milk to them and stood by their heads avoiding to disturb them from sleep and I did not deem it advisable to serve milk to my children before serving them. My children wept near my feet. I remained there in that very state and my parents too until it was morning. And (0 Allah) if Thou art aware that I did this in order to seek Thine pleasure, grant us riddance from this trouble. (The rock slipped a bit) that they could see the sky. The second one said: 0 Allah, I had a female cousin whom I loved more than the men love the women. I wanted to have sexual intercourse with her; she refused but on the condition of getting one hundred dinirs. It was with very great difficulty that I could collect one hundred dinirs and then paid them to her and when I was going to have sexual intercourse with her, that she said: Servant of Allah, fear Allah and do not break the seal (of chastity) but by lawful means. I got up. 0 Allah, if Thou art aware that I did this in order to seek Thine pleasure, rid us from this trouble. The situation was somewhat eased for them. The t hird one said: Allah, I employed a workman for a measure of rice. After he had finished his work I gave him his dues (in the form of) a measure of rice, but he did not accept them. I used these rice as seeds, and that gave a bumper crop and I became rich enough to have cows and flocks (in my possession). He came to me and said: Fear Allah, and commit no cruelty upon me in regard to my dues. I said to him: Takeaway this flock of cows and sheep. He said: Fear Allah and do not make fun of me. I said: I am not making a fun of you. You take the cows and the flocks. So he took them. 0 Allah, if Thou art aware that I did it for Thine pleasure, case the situation for us. And Allah relieved them from the rest of the trouble. (Sahih Muslim)

Abu Huraira reported Allah's Apostle (may peace be upon him) as saying that Allah, the Exalted and Glorious, said: When My servant draws close to Me by the span of a palm, I draw close to him by the cubit and when he draws close to Me by the cubit, I draw close to him by the space (covered) by two hands, and when he draws close to Me by the space (covered) by two hands, I go in hurry towards him.'

Abu Hurairah reported, "The Prophet, peace be upon him, said, "Nothing is more dear to Allah than one's supplication to Him.'' (Tirmithi and Ibn Majah)

The Prophet Muhammad said: "Whosoever desires that Allah answers his duas in unfavorable and difficult conditions, he should make plentiful dua in days of ease and comfort." Also he said: "The person who does not ask from Allah, Allah becomes angry with him."

And your Lord says: "Call on Me; I will answer your (Prayer): but those who are too arrogant to serve Me will surely find themselves in Hell - in humiliation!" (Quran 40:60)

"Call upon your Lord Humbly and in secret" (Qur'an 7:55),

"Is not He (best) who listens to the (soul) distressed when it calls on Him, and who relieves its suffering." (Qur'an 27:62)

Here is a website with dua's of the Prophet Muhammad (peace be upon him) for different occassions and situations. The website has the dua's in arabic, in english translation, and the english pronounciation of the arabic. The title of the book is "Fortification of the Muslim through remembrance and supplication from the Quran and the Sunnah".

(Hadith - Tirmithi)

Whoever gives life to one of my Sunnahs which was eliminated after my time will receive the reward of all those who practice it without their reward being diminished...

(Hadith - Tirmithi)

Whoever gives life to one of my Sunnahs, he loves me: and whoever loves me is with me.