Ecclesiastes 9:7 says, Go thy way, eat thy bread with joy, and drink thy wine with a merry heart; for God now accepteth thy works.  I believe that Solomon is saying to us that as we live our life for God, under His direction, these are things that we should do.  When we have been blessed with food, we are to enjoy eating it.  We are to enjoy what is ours and not attempt to claim what belongs to others.  Solomon tells us to enjoy our wine with a merry heart.  This does not mean to get drunk to get happy.  I also believe we can assume this was alcoholic wine, but we are called on to enjoy both food and drink in moderation.  When we are content to live with what God blesses us with we will be joyful and God will accept our works.  We need to realize that just because we say we are doing something for God doesn't mean that God has to accept what we do.  God will always look beyond the action to the reason for the action.  Verse eight says, Let thy garments be always white; and let thy head lack no ointment.  I believe that Solomon is saying to us that we are always to attempt to live a pure life in dedication to God.  We are not being called on to only wear white clothes and have our heads annointed with oil but to live a life that these things represent.  White means purity, and we are to live our lives in purity before God and other people that we encounter.  Yet, until we live in purity before God we cannot hope to live in purity toward others.  There are no magic or holy clothes that can make us pure before God, but only a pure heart.  Annointing ones head was a sign of God's blessing, but for us it is more than a physical act.  We are to let all our thoughts be under God's guidance, and if they aren't, no amount of oil will help us.  Verse nine says, Live joyfully with the wife whom thou lovest all the days of the life of thy vanity, which he hath given thee under the sun, all the days of thy vanity: for that is thy portion in this life, and in thy labour which thou takest under the sun.  Solomon had three hundred wives, but that was never God's plan.  God's plan is one man and one woman completing one another for a lifetime.  If both are dedicated to each other under God's guidance, it will be a joyful marriage.  We must always approach marriage with this understanding, even if things have gone wrong in the past.  We must live satisfied with what God blesses us with materially, but we must live joyfully in our marriage.