"For I through the law am dead to the law, that I might live unto God." Galatians 2:19
Dead to the law means that the law no longer has a hold on you. You have been freed to serve God without the hindrance of following the letter of the law. Freedom from the law is not license to sin nor is it an excuse from the responsibilities of following after Christ with your whole heart.
Living unto God is made possible by the sacrifice that Jesus made for us on the cross. Living unto God is possible now because we have been adopted into the beloved by God. You are a child of God, therefore you can serve God without reservation. Those who have not been born again cannot serve God without reservation. First they don't believe they can and secondly they do not have the indwelling Holy Spirit in their life. Without the indwelling Holy Spirit we are all doomed to frequent bad choices and unchecked propensities that are not godly. But with the power of the indwelling Holy Spirit within we have been enabled to serve God at any level, at any capacity, without boundaries or obstacles.
We have this potential, but that does not mean that we automatically always do the right things or make the right choices. Sometimes we might even make a choice that is contrary to the leading of the Holy Spirit. But if you are willing to yield your will to His will, you are empowered to overcome in every situation.
We hear much about how you can't even go a whole day and not sin; everybody sins; after all we are all human. The main reason that there is so much emphasis on this is that people don't want to slow down enough to think before they act. Hours of prayer prior to making decisions is all but dead in modernity. Thinking about and carefully considering all the consequences of our actions is not trendy, nor will it win your friends attention. Thinking about each decision and asking God's approval before jumping ahead is not the way of the modern world.
Much can be done to improve your walk with God and most of it requires that you think on godly things, thus God-thinking. It's not just thinking on godly things that keeps us going forward in growing closer to God, but in the abandonment of and discontinuation of those things that are not godly as well. There is much thought today among Christians about mixing it up; a little church and christian-eze and a little worldliness, a little faithful and a little unfaithful, a little sold out and a little kept back in reserve. The mindset is that this is balance. This is the kind of balance that wins no souls and gets no victory. Just maintaining a minimal relationship with God in order to make sure you enter into heaven is shallow at best and may not be Christianity at all.