How to gain good fortune that is immeasurable and boundless?

You have been able to accept, uphold, read, recite and ponder this sutra and to preach it for others. The good fortune you gain thereby is immeasurable and boundless. It cannot be burned by fire or washed away by water. Your benefits are such that a thousand Buddhas speaking all together could never finish describing them. Now you have been able to destroy all devils and thieves, to annihilate the army of birth and death, and all others who bore you enmity or malice have likewise been wiped out.

Good man, a hundred, a thousand Buddhas will employ their transcendental powers to join in guarding and protecting you. Among the heavenly and human beings of all the worlds, there will be no one like you. -The Lotus Sutra

Buddhism Day by Day
Wisdom for Modern Life by Daisaku Ikeda 18/9

Effects of misfortune and fortune

Misfortune comes from one's mouth and ruins one, but fortune comes from one's heart and makes one worthy of respect. 30/8

The Writings of Nichiren Daishonin
New Year's Gosho
Written to the wife of Omosu on January 5, year unknown

Meaning of Buddha in Sanskrit

The Sanskrit word buddha means " One who is awakened (to truth)." While the term was widely employed by various schools of the time, it eventually came to be used exclusively in reference to Shakyamuni. At the same time, the word buddha implies "to bloom". A person who causes flowers of lofty character to brilliantly bloom and bears the fruits of good fortune and benefit in abundance is a Buddha. Such a person manifests the benefit of the Law and shines with character overflowing with blessings.