Front row is best, you can hold on to the barrier. Rows behind that can get pretty "violent" yeah... Otherwise stay back a little and stay to either the right or left side of the stage. Avoid the middle, that's the part where the pushing and shoving is worst. Also, during the last song a lot of people will want to jump on stage (sometimes sooner than that) so if you're in the front row, beware of the stage invaders.