Gah, thank God for this thread!! DD is just off the 18-month mark and I *know* she can be toilet trained now, it's just the logistics of it that have me stumped!
I was sure she was ready to try a couple of months ago, because she was always taking her nappy off and could tell me when she'd done a poo, and she's always in the toilet with DH or I when we go so she knows what the deal is. She had no problems sitting on the potty and wiping herself with toilet paper or baby wipes, but she'd sit there, wipe herself, jump up and run off without doing anything, and then pee on the floor.

We gave up after a week of accidents, figuring it just wasn't her time. But I really want to make a good go of it this time around, especially seeing as DD2 is due at the end of May and I don't want to be changing two sets of nappies!

I gave it another go this morning - when I got her out of bed and changed her wet nappy, I popped a pair of 'knickies' on her and tried putting her on the potty every half hour or so. I was doing the dishes and she came up behind me with her hand on her bits, and I asked if she needed to pee - she nodded and ran for the potty, but then just sat there drinking some water and did nothing.
I figured if I kept a close eye on her I could get her to the potty before she peed all over the floor, but for a good three hours - nothing. Then, I noticed a puddle on the floor and DD was hiding behind the curtains with a huge grin on her face, and a very wet pair of knickers on. I wonder if maybe she prefers to wet herself because it means she gets a quick shower to freshen up? And in DD's world, bathtime is second only to dinnertime on her list of favourite things.
The other day a friend and I were sitting at the table having a coffee and DD dragged her potty to my feet, took her nappy off and sat down on it for a while, but again, nothing happened. I'm absolutely sure she's ready to be toilet trained, as she knows when she's doing pees and poos and hates wearing nappies, and loves sitting on her potty, but I just can't seem to get her to sit long enough to actually do anything!

Any tips?