One of the most common prayer requests I have received as a pastor is: "Please pray that I will know the will of God." Sometimes the request is for a specific circumstance more often just in general wanting some direction or guidance. I read somewhere that in one European nation the people spend five-billion dollars a year on fortune tellers. They want to know the future and what to do to prepare for that future. I think sometimes we approach God in the same way. "God, please reveal the future for me so I can arrange my life accordingly." But, God has revealed the future with full instructions on how to prepare for it in His word. From cover to cover in the Bible is the revelation of God to man and what God has done and what man must do.

In Colossians 1:9-12 For this reason we also, since the day we heard it, do not cease to pray for you, and to ask that you may be filled with the knowledge of His will in all wisdom and spiritual understanding; that you may walk worthy of the Lord, fully pleasing Him, being fruitful in every good work and increasing in the knowledge of God; strengthened with all might, according to His glorious power, for all patience and longsuffering with joy; giving thanks to the Father who has qualified us to be partakers of the inheritance of the saints in the light. (NKJV)

To be filled with the Knowledge of God's will is something we all want but we see in these verses what the intended result of that knowledge is to be:
(1) That we walk worthy of the Lord fully pleasing Him. Knowing God's will with all wisdom and spiritual understanding enables us to walk with the Lord without stumbling.
(2) Being fruitful in every good work. Knowing God's will brings fruitfulness in all good things we do.
(3) Increasing in the Knowledge of God.Knowing God's will increases our knowledge of God, of who He is, of what He does and what He says. Strengthened for all longsuffering and patience with joy.
(4) Knowing the will of God equips and strengthens us for adversity.

Knowing the will of God is not to know your future, it is to know how to walk with Him in the present, fully pleasing Him. It comes as we ask. The answer will be increased spiritual knowledge and discernment and a worthy walk. You won't need to ask what to do because you will already be doing it.