What age to begin potty training

We did the 3 day method with our children, which is suggested for 22 months. Many people wait to potty train until their child starts showing signs of being ready. Signs can be
- alerting parents to the need for a new diaper
- removing diaper themselves
- hiding to poop
- staying dry during naps and/or overnight
- asking questions about the bathroom/toilet or asking to watch others use the toilet

What other readiness signs am I forgetting??

BethSummerville, South Carolina
Moms Expertise
About Beth
Current: Summerville, South Carolina
Birth: September 18
On Moms.com since: Aug 18, 2013
obsessed with babywearing, cloth diapering, and breastfeeding (but not judgmental about those that aren't). I'm a SAHM that works. Loves cupcakes, kittens, and glitter; hates spiders, housework and pessimism.