How to walk with God

First, you must come to the point in your life, that you give it all over to God. You let Him 'take the wheel.' The old fashioned way of saying it was, make Him Lord of you life. Back in Jesus' time, there were still slaves, and your Lord was the Master, the Boss, the one that was over your life. You accept the fact we all sin because we were born into it (due to Adam and Eve's sin.) We agree with God that we are sinners (and aren't perfect.) We accept His gift of dying on the cross for our sins and taking our punishment (of death) for us. And we 'repent.' That means we purpose to not sin anymore. It doesn't mean you will be sinless from now on, but you have to be trying. You keep strong by renewing your mind with His Word, the Bible. Your faith will keep growing when you hear The Word. His words are promises for His children's lives.
And then every time you come to a fork in the road, take the HIGH road. Do the right thing. Always do the right thing and let the chips fall where they will. And if you don't know if it's the right thing or not? You see what the Bible says, and follow that. If it's not answered there, seek out a Godly person. And then follow your gut feeling. If you feel a peace in your gut, it's probably right. If you feel chaos in your gut, it's probably not. God leads His children that way.
For example, God's Word says, 'Vengeance is mine, says the Lord.' You see from this that revenge is never what God wants. He WILL take care of it, and in a much better way than we ever could.
Always remember, TAKE THE HIGH ROAD!