7. Try The 3-Day Method
Developed by stay-at-home mom Lora Jensen, 3-day potty training has parents put their kid in underwear right away. The two essential components are repeatedly saying to your child, "Tell me if you need to use the potty" and channeling your inner helicopter for three consecutive days.

When they start to go, you zip them to the bathroom. If any gets in the toilet at all, celebrate like heck. It's messy but effective.