If you know an author, and are at the same convention with them, or share the same local bookstore or library or coffee shop, and you see that they’re scheduled to give a reading:
Go to their reading.
Unless they’re serious rock stars like Neil Gaiman or George R. R. Martin or J. K. Rowling, most writers live in fear of the dreaded 10 AM Sunday morning reading slot . . . the one where the audience consists of four rows of empty chairs and one drowsy con-goer who fell asleep in the room after the last party of the night before and is now too embarrassed to leave.
What do you get in return for taking the time to attend a reading? Well, stars in your crown in heaven, of course, and the chance to hear early drafts of forthcoming books and works-in-progress, and the sincere and profound gratitude of the writer in question.
Especially at 10 AM on a Sunday morning.