God does not showers blessings, he showers opportunities.
A little "thank you" that you will say to someone for a "little favour" shown to you is a key to unlock the doors that hide unseen "greater favours". Learn to say "thank you" and why not?
A heart favours love, a head favours work, a heart and head both favours hobby.
If you feel that favors can be returned then you are wrong, no matter how ever big or small it is, it can never be returned. Favor is always for lifetime...
Do someone a favour, you make a friend; favour 'em too much, you make an enemy.