Psalm 32:8 (NKJV)
When you are planning to go somewhere, you start with a destination and then figure out how to get there. When you plan your route, there are several options you could choose. You may have an option of how you want to travel, whether in a car, by airplane, or even with a train or other public transportation. You also need to decide if you want to go directly to your destination or if there is something along the way you need to, or want to, do or see, there are many alternate routes you could take.
As Christians, there is a destination we all should have, to find and fulfill the will of God. Spending eternity with Jesus in heaven is not our main goal in life; it is certainly something to look forward to, but God has a plan for us while we are here on the earth. In doing the will of God, there are different routes available to us and we want to be sure to take the right one and not some alternate route that does not help us. The good thing is that we don't have to try and figure out the entire route for ourselves, God said that He would guide us.
Psalm 32 talks about God instructing and teaching us in the way we should go. God has given us His Word that we can read and study to get God's general direction and the Holy Spirit will direct us. If it was up to us, we might take a route based on some things we want to do, but that alternate route may actually take us off the path that God has for us. We need to leave the route planning in our life to God so that we don't find ourselves on some alternate route.