I trained my dauhter at 22 months. A friend of mine had found an article on the web and wanted me to try it out, if it worked for me she was going to try it. (I'm a sucker!!!)
It was called the three day method and worked great on my little girl. You have to stay home for three days, the article suggests that if you work you take off a Friday and Monday. If it works, the Monday is to celebrate.
One morning we woke up and SHE threw away all her diapers and helped me open all the new panties (45 pairs!) Everytime I saw her going we ran to the potty. The first day we went through about 35 pairs, the second day 4 and the third day 1!
She also wore panties at night. No pull up, no diaper. We just put an inconpresis pad under her and when she went potty we got up changed her pad and panties. Within a month she was night trained.
The key was to throw away the diapers and only use panties. I almost dug in the trash for the diapers the first day!
Three of my friends (all with boys decided to try) it didn't work for any of them! I will be doing it with my youngest daughter as well!
There are tons of methods and it is hard to find the right one for your child. My daughter likes to be in control, is very self motivated and independant. Good luck.