The whole bible actually forms the whole counsel of God for humankind. However, what you have in the bible is the generic will of God- what applies generally. You need the specific will of God to live your own life because you will not see in the bible specific details of your life written in letters.
In the medicals, they have specialists in diverse fields. However, the specialists did not start their learning from that specialization. They all have to study the general medicine first and from the general they proceeded to the specialization. Therefore, if you are going to understand the will of God, you must start from the generic and get to the specific. Because whatever you are going to practice, as a specialist will not contradict, what you are told as a general practitioner. Likewise, the specific will of God for you will not contradict his generic will.
God's specific assignment for you on this earth had been specified from the beginning and was committed to your spirit, which had existed from that same beginning. Your assignment was written in the name of your spirit. Your name might not be spelt out then, but your spirit was already alive and God knows how he identifies your spirit. When that spirit arrived this planet thousands of years later through your mother and father, your body and your soul tries to live a life. For some, their soul will still try to pick something from their spirit and get some traces and tries to play around it. However, if you are going to do God's will hundred percent your spirit must be regenerated. You must be born again to do God's specific will for yourself.
For we are God's masterpiece. He has created us anew in Christ Jesus, so that we can do the good things he planned for us long ago. Ephesians 2:10 NLT

Before you can do, you need to know. If you do not know, you cannot do it well. Randomness, trial and error becomes the order of the day. You play a guessing game with life. Therefore, you need to know the will of God so that you can do it. Note that the will of God is not a one-time event but an accumulation. Therefore, you must know per time what he wants you to do. The secret of knowing is also the secret of doing. It is the Holy Spirit.
Only the Holy Spirit knows what is in the mind of God concerning you. You do not know your neighbor thoughts except him. Likewise, only God's spirit knows God's intent, plan and purpose for everyone.
But we know these things because God has revealed them to us by his Spirit, and his Spirit searches out everything and shows us even God's deep secrets. No one can know what anyone else is really thinking except that person alone, and no one can know God's thoughts except God's own Spirit. And God has actually given us his Spirit (not the world's spirit) so we can know the wonderful things God has freely given us. 1 Corinthians 2:10-12 NLT

The Holy Spirit downloads God's plan into our hearts. When you have data on your device, the volume of the data you have determine the access you have to information. Likewise the more you are full of the Holy Spirit, the more information- revelation you can access from the heart of the father. What is the size of your spiritual data? You need as much of the downloader- the Holy Spirit as possible, to assess the much you need. When you know as much as possible, it will be easier for you to do as much as possible.
for it is God who works in you to will and to act according to his good purpose. Philippians 2:13 NIV
The spirit takes over some of your senses. He causes you to will. Before you do something, you must have determined to do it. If you were going to stand, you would have willed in your mind that you are going to stand up. Now to get that will, determination and mindset, the Holy Spirit cause you to will. The Holy Spirit gives you a prompt, urge, and nudge, and you feel like you want to do something you never planned to do before. A new and fresh thought is formed in you and you sense the need to do something, make a call, and go somewhere. The Holy Spirit is causing you to will, to make decisions and he helps you to carry it out if you yield yourself. While we do his good will, he abides with us still for those who will trust and obey. Several times, you receive promptings and yet you do nothing with them.
When you pray, check the promptings that come to your mind. After praying in tongues, check the thoughts that flow through you. Speaking in tongues clear the debris on the road. It makes the path of communication smooth for the Holy Spirit to be able to push his thoughts forward. What makes contact with the world is the body. That is where your sense organs are placed. The soul is in the middle while the spirit that is in contact with the Holy Spirit is behind. The more you pray in tongues, a road is made for the spirit to come to the front. The flesh still wants to make a battle, but more praying in the spirit pushes your spirit forward ahead of the senses. That is why some things you cannot remember, you remember them when you pray in tongues. Things you are not aware of, you are acquainted with them when you pray in the Spirit. You get praying in the Spirit and God shows you some picture, the spirit has gone on a journey and praying about those issues. Praying in the Spirit makes the flow of communication easier.
How lovely it will be to maintain the Holy Ghost atmosphere continuously with your will and desire being shaped continuously to conform to God's eternal purpose. There is a prompting inside you connecting you to purpose.