the best advice that i can give you is, you will learn more from your students then you will ever learn from any book you read. Ive been a CFI/CFII/MEI for just under a year, its very rewarding when you have a brand new student finally understand a concept for the first time. When you sign their logbooks, sign your name put your commercial certificate number add the cfi and then the expiration date next to that.

(mysignature 2223565cfi 04/10) thats what the endorsement should look like.