If you like the results, visit the official Effortless English Club (note: A.J. Hoge has since moved to "Learn Real English" with co-teacher Joe, but the original Effortless English lessons are still available).
Textbooks use fake English. "The pen is on the table." Native speakers don't talk like that.
This is Hoge’s most powerful technique for grammar. Instead of studying a table of verb tenses, listen to the same short story three times, changing the time each time: