I am working out regualrly since mid 2012 (together with my wife and son) and doing it as a family has made such a difference. Our health has improved tremendously as well as our physique (downside is that you run out of fitting clothes very fast). But it is a blessing to see good results and be an inspiration to others.

At times it is hard to combine work, family, church and workout but with God all things are possible.
If we hold on to Him, He will provide all we need.
Follow this rule and you will achieve what your heart truely desires:
But seek first the kingdom of God and His righteousness, and all these things shall be added to you.
Matthew 6:33 (NKJV)

A) It is fun (especially with my wife and 4 year old son).
B) Getting results is a HUGE motivation. I feel stronger and more energized, I can see the results (and so does my wife).
C) Working out together as a couple is the best form of support and encouragement.