For a disciple of Jesus Christ, eternity begins the day he or she is born again into His Kingdom. Eternal life begins the day they accept and trusts Jesus as their Saviour and Lord. Hence everything they have, everything they do and everything they are, will now be evaluated in the light of eternity. Does it matter from eternity's perspective, if I have or have not? Does it matter if I do or not do?
What matters is doing the will of God for that is what each of us are created for - the general will and the specific will. The general will is to worship Him and glorify Him in what we are and do each day. The specific will is to walk daily in His plan for each of our lives.