Now these are the commandments, the statutes, and the judgments, which the LORD your God commanded to teach you, that ye might do them in the land whither ye go to possess it: That thou mightest fear the LORD thy God, to keep all his statutes and his commandments, which I command thee, thou, and thy son, and thy son's son, all the days of thy life; and that thy days may be prolonged. Hear therefore, O Israel, and observe to do it; that it may be well with thee, and that ye may increase mightily, as the LORD God of thy fathers hath promised thee, in the land that floweth with milk and honey.
Here we are told that these commands are for "thy son's son all the days of thy life." which means that these are still for us. Following the commands, statutes, and judgments of the Lord will prolong our days. God gives us these commands that we may have a good life. God's commands are not given to us to stifle us or make life miserable. They are to help us live a life full of blessings and increase.
Fear the Lord and live!