Personally, I don't like holding the dog's head up to where I am supporting the neck/head. To me it looks unnatural. But many people do it. I use treats in the ring - other handlers don't. There is no 'right' or wrong way. And different judges have preferences for what they like. You have to decide what makes YOUR dog look his BEST. What angle his head looks good, topline, chest, etc. What angle the judges will be looking AT him is important. You want his best features to be prominent and minimize his faults. For anyone who says their dog has no faults, they are wrong. There are no perfect dogs, all dogs have some minor fault whether it be in their hocks, or toes, stance, gait, ear set, whatever. A good handler learns how to compensate for it. Which is why you see so many handlers fussing over every foot, pushing up on their dog's belly, holding the tail up and out, etc.
Just an example: You can make your dog's chest look slightly wider by placing the front feet just to the outside edge of the breast - whereas your dog may naturally want to stand with feet closer together (even with toes almost touching) - thereby making the chest look more narrow. This is commonly done with English Bulldogs to make them look even more barrel chested.
I would watch videos and go to the shows just as a spectator. Watch handlers and try to see what they did different to make their dog win.
