When things do not go our way, it is easy to believe the mind's condemnations. By doing so, we put ourselves into a far deeper hell than the true event could possibly cause. To avoid that hell is to choose to be re-minded.
In the Tibetan Buddhist tradition, according to the Dalai Lama, a person should closely observe a teacher for three years before consenting to be his/her student. It takes that long, apparently, to clearly differentiate Mara from Buddha.
A generous act, obviously, is an act of giving something to someone other than oneself. An act of the perfection of generosity is an act of giving something to someone that one knows will advance both the giver and the receiver along the path to true and lasting happiness.