How do I potty train my 20 months toddler? Whenever I place her on the potty, she'll start screaming and wailing & grabbing my neck tightly. :(

20mths sounds quite early. Though I personally know a kid who was trained at 17mths old. My own child only wanted to try at 35 mths and still training now. I used the "ladder" kind attached to the toilet bowl. She seems to like it.