Maybe at her age when she has wet herself get her to help you clean up the mess and rinse out her clothes. Might sound mean (and a little gross) but then she will hopefully realize that it is more work wetting herself then getting up and going to the toilet..

When our kids had poo accidents we would get them to help us tip the poo into the toilet and laugh at the sound it made (also gross but helps them find humour about going to the toilet) Then we would talk about how their tummies felt when they had to go and to try and remember that for next time..

Maybe before she sits to eat or watch tv take her by the hand and to the toilet and tell her she has to do a wee before she does such and such.. Or if possible put a potty in the lounge room. Personally I hated that but it was the only way we could get DD to the potty in time. The boys were generally good at getting to the toilet and they hated the potty anyways but DD was fine with it.. Eventually she wanted to be like her brothers and use the toilet