Let Him Ask in Faith - James 1:5,6

If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him. But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.

It is imperative that we remember to pray. Prayer is not reciting a rote memorized script such as the Lord's prayer (although it could be on occasion if our heart is in it). Nor does it have to take hours. Actually, it should only take as long as is needed to say what He needs us to say. It sounds weird, but prayer usually starts out as us trying to say what is in our hearts, and should end up with us saying what He desires us to say.

This scripture sates that we should approach Him with faith. But faith typically requires some knowledge from Him. In the very least, it should be some notion of what is right, but may be a strong assurance of His will. The more knowledge we attain of His will pertaining to a certain thing, the stronger our faith in it should be. I don't believe He expects us to have faith in anything until He grants us knowledge of the thing to be faithful in. Prayer perhaps is the art of obtaining the will of God and asking for it to be done.

When our assurance that the thing we're praying for is right is not firm, the prayer becomes a wrestle. "...work out your own salvation with fear and trembling." (Philippians 2:12) "I will tell you of the wrestle which I had before God..." (Enos 1:2) Prayer is usually perceived as us attempting to change the mind of God, but to the sufficiently humble, it is usually a process of offering to let Him change us.

A further principle that is important to latch onto, is that honesty and real intent is always required.

Moroni 6:8
But as oft as they repented and sought forgiveness, with real intent, they were forgiven.
Moroni 7:6
For behold, God hath said a man being evil cannot do that which is good; for if he offereth a gift, or prayeth unto God, except he shall do it with real intent it profiteth him nothing.
Moroni 7:9
And likewise also is it counted evil unto a man, if he shall pray and not with real intent of heart; yea, and it profiteth him nothing, for God receiveth none such.
Moroni 10:4
And when ye shall receive these things, I would exhort you that ye would ask God, the Eternal Father, in the name of Christ, if these things are not true; and if ye shall ask with a sincere heart, with real intent, having faith in Christ, he will manifest the truth of it unto you, by the power of the Holy Ghost.
2 Nephi 31:13
Wherefore, my beloved brethren, I know that if ye shall follow the Son, with full purpose of heart, acting no hypocrisy and no deception before God, but with real intent, repenting of your sins, witnessing unto the Father that ye are willing to take upon you the name of Christ,..

Note that the wrestle is not with us and God, it is a wrestle within ourselves - A wrestle to subdue the natural man, to receive the power and grace needed to align our will with His, and having obtained it, to have faith to follow through.

"I pray... Not that it changes God, it changes me"
- C.S. Lewis