What is [Yahweh's] God's Will?

How do we know what the Will of Yah (God) is for our lives?
In college I was asking this question, mostly thinking about what does He want me to do with my life? What major, what friends/relationship to have, what job to take? It was always confusing to me to know if I was doing what Yahweh wanted for me in my life. I expected there to be this voice from above telling me to do (this). But then I looked at the scripture and really studied what the Will of Yah (God) is. And it is much more simple than you would think. 

Definition of will>#1 The mental faculty by which one deliberately chooses or decides upon a course of action #3 A desire, purpose, or determination, especially of one in authority (answers.com) Rom 12:2 "Do not conform yourselves to the standards of this world, but let God transform you inwardly by a complete change of your mind. Then you will be able to know the will of God---what is good and is pleasing to him and is perfect."

• In order to know the will of God we need to view things differently than the world
• We need to view things the way God views them
• for example the world views adultery as a married person sleeping with another person but as we know God views adultery differently: Mat 5:28 "But I can guarantee that whoever looks with lust at a woman has already committed adultery in his heart."
• Luk 6:27-30 "But I tell you who hear me: Love your enemies, do good to those who hate you, (28) bless those who curse you, and pray for those who mistreat you. (29) If anyone hits you on one cheek, let him hit the other one too; if someone takes your coat, let him have your shirt as well. (30) Give to everyone who asks you for something, and when someone takes what is yours, do not ask for it back.
• How different that is from how the world acts. Jesus tells us to do pretty much the opposite of what we would normally think to do. That means every beggar that asks me for something according to Jesus I am obligated to give them what they ask for. And the book I let my friend borrow - i shouldn't ask for it back. I still long to have it back even though they borrowed it 2 years ago.
• Eph 6:5-7 ESV Slaves, obey your earthly masters with fear and trembling, with a sincere heart, as you would Christ, (6) not by the way of eye-service, as people-pleasers, but as servants of Christ, doing the will of God from the heart, (7) rendering service with a good will as to the Lord and not to man,
• This would mean that doing the will of God would be serving our human masters as if we are serving God. So, I can do God's will by serving my boss at work as if i were serving God. The passage describes what that type of serving looks like - fearing the boss, working from the heart, working good even when no one is looking, trying to please God not people (which is a higher standard)
• 1Pe 2:15 For this is the will of God, that by doing good you should put to silence the ignorance of foolish people. 
•  In the latter part of 1Tessalonians Paul gives a lot of direction on how God wants us to act (1Th ch 4)
• 1Th 4:3-4 ESV For this is the will of God, your sanctification: that you abstain from sexual immorality; (4) that each one of you know how to control his own body in holiness and honor,
• 1Th 4:3 clearly states that the will of God is to make us holy, and even more explicitly to abstain from sexual immorality - pointing out this specific sin shows how detrimental it is. So if I am to follow God's will I need to do everything that would make me more holy or sanctified
• How are we made holy? We are cleansed by the blood of Jesus. Rom 1:17 "For therein is the righteousness (holiness) of God revealed from faith to faith: as it is written, The just shall live by faith." - with our faith in Jesus we are made holy and through continued faith we are cleansed more (because of course we get dirty)
• faith can be defined as belief, trust, devotion to (deep love or commitment)
• Christ told us to love him is to obey his commandments (John 14:21)
• love one another (1Th 4:9-10)
• 1Th 4:11 Also, make it your goal to live quietly, do your work, and earn your own living, as we ordered you.
• 1Th 5:11 Encourage and build one another up 
• 1Th 5:12 Brothers and sisters, we ask you to show your appreciation for those leaders who work among you and instruct you.
• 1Th 5:14 We encourage you, brothers and sisters, to instruct those who are not living right, cheer up those who are discouraged, help the weak, and be patient with everyone.
• 1Th 5:15 See that no one repays anyone evil for evil, but always seek to do good to one another and to everyone.
• 1Th 5:16 Be joyful always,
• 1Th 5:17 pray at all times,
• 1Th 5:18 be thankful in all circumstances. This is what God wants from you in your life in union with Christ Jesus.
• 1Th 5:19 Do not restrain the Holy Spirit;
• 1Th 5:20 do not despise inspired messages.
• 1Th 5:21 Put all things to the test: keep what is good
• 1Th 5:22 and avoid every kind of evil.

"And Yahushua answered him, The First of all the commandments is, Hear, Oh Israel, Yahweh is our Elohim, Yahweh is one: And Thou shalt love Yahweh thy Elohim with all thy heart and with all they soul, and with all thy strength: this is the first commandment. And the second is like, namely this, Thou shalt love thy neighbor as thyself. There is none other commandment greater than these." (Mark 12:29 RNKJV)

"After all this, there is only one thing to say: Have reverence for God, and obey his commands, because this is all that we were created for." (Ecclesiastes 12:13GNT)

It is simple if you are honoring Yahweh with your life, obeying his commands, and loving Yahweh and your neighbor as yourself you are doing the Will of [God] Yahweh. I used to think you had to be a missionary or something specific related to faith. But the truth is you can Honor Yahweh in whatever job or endeavor your choose to do. You will have opportunities to share about the faith no matter what you are doing. 

That was what I found in the Bible related to the will of God, but I found a great website that tells more about God's will "Knowing God's Will".