For 16 minutes today, spend time with God praying about your giving. Thank God for all He gives to you. Ask God to show you who to give to and what you give them and do it. Sometimes we have to give until it hurts, but don't worry, God promises that He'll take care of us.
What can we give to God? Obedience, praise, our surrender. The bible says...
Give, and it shall be given unto you; good measure, pressed down, and shaken together, and running over, shall men give into your bosom. For with the same measure that ye mete withal it shall be measured to you again.
Luke 6:38 KJV