"The Most Powerful Abundance Prayer I've Come Across" on YouTube -
God is generous .He is our real source of goodness.If we truely believe in him, the creator of the world, he will give us abundantly. He is all mighty and all capable to give and as you say nothing is too good to true because God supplies infinitely but we should be thankful to all the blessings in our life.
Another thing to be attentive to that God never takes something way from us unless he gives something better in return. He never closes a door to wealth untill he opens another greater doors of wealth and goodness. We need to help freely from our hearts whenever we can.