Otherside My daughter can tell me negative things as much as she likes. However, she needs to be solution oriented. If she goes into a workplace and whines about how things aren't going her way, and doesn't come up wiht solutions, she'll never succeed. She'll be like the many, many people you work with who everyone despises because they're so damned miserable all the time.
Whining is a habit, as is positive thinking. For years we have encouraged dd to think of solutions when a problem occurs. The result is that at 10 she's generally self sufficient and can think through problems on her own.
She complains about something. I accept her feelings about it (very UP as I understand it) then I ask her what she thinks the solution is (from How to Talk To Your Children). If she can't think of one, I ask her if she wants me to implement a ludicrous solution of my choice. She laughs. I say well stop moaning, because I'm tired of it now. Either think of a solution or you have to put up with it. That's life. That's what you need to get on in the world.
Empathy with your child is not the exclusive domain of the UP parent. My dd is supremely confident about her body, whilst her peers worry about their weight and body shape; she's happy to play with anyone in the class, including the kids that struggle with social situations; she's invited for sleepovers frequently by a variety of parents and is always given back with a smile and 'she can come here and stay anytime'. She's academically in the top percent at school and, more importantly to us, she's socially adept.
I've read the books on occasion, when recommended to do so by others. I've always found that my instincts work well enough with parenting and thanks, but I'm quite happy with my unique, unbookish, parenting methods. You want to UP, go ahead. You've got as much chance of screwing up your kids as I've got of screwing up mine cos it's just parenting.