Perfect or Imperfect Timing Under Heaven? (Ecclesiastes 3:1-15)

The preacher in Ecclesiastes claims that all is vanity.  If this is true then why continue with life?  If this life is so meaningless then why get up every morning?  If this is really true does that mean that God has forsaken His creation? If God has not forsaken this creation what does it mean?  How do we account for non Christians actually enjoying their work or seeing it as fruitful?   So, is everything really vanity under the sun or is the preacher just overstating his case?