Over all, keep it simple. If you manage to find success with one of these, don't feel like you need to try them all! There is no 'one size fits all' to potty training so listen to your littles, address their needs but be firm in your style and chosen method.
"Am I ruining my kids? Will they remember all the times 'mommy lost her cool'? How can I ever explain to them that I didn't mean to sound rushed, exhausted and irritated.... I loved them, I wanted to sound like I loved them so much more than I do...!"