I have discovered several ways for my LO. 1) put my knuckle over her mouth and she starts sucking it. This one is handy to know when she's hungry as she will latch on. I have read that you can use the back of your little finger as well with the nail against her/his tongue. 2) put her belly against your chest and head above your shoulder and gently bounce her or run your finger down her back.
I'm sure as i go along I'll figure out more but for now thats all i have