Formal:
* "The unexpected inheritance was a godsend for the struggling family."
* "The doctor's innovative treatment proved to be a godsend for the patient."
Informal:
* "That extra shift at work was a godsend because I needed the money."
* "My friend offering to drive me home was a godsend after that long night out."
* "That rain was a godsend for my parched garden."
Figurative:
* "Finding a parking spot right in front of the restaurant was a godsend." (This uses the term metaphorically, implying that it was a very fortunate event, even though it wasn't literally sent by a god.)
Note: While "godsend" is often used in a religious context, it's also widely used in a secular way to express gratitude for something incredibly fortunate or helpful.