My Christian wife has been giving tithes ever since she was in college. Thanks to her, I realized the true meaning of tithing. Instead of thinking that I was just giving away my money, I was enlightened. I realized that all my achievements, blessings, and talents were given by God. It was only fitting that I give back at least ten percent of what I earned because of His Grace.
Think about it. When God blesses us with talents, he goes all out a thousand percent! When you give back at least ten percent, God is still letting you keep the ninety percent you earned. Do not look at what you think you are losing. Instead, look at what you get to keep.
We also earn more blessings when we bless others. It is a beautiful cycle: the more you give back, the more you earn. This drives you to be more productive.
Needless to say, when you give, give with an open heart. Do not give just because you feel required to do so. Do not give because your motivator is to get back more. Remember, God loves a cheerful giver.