Did it a few years back, was very difficult, but my university partnered PGCE students so that they worked in the same school. Made it a lot more easier as we started by teaching as a pair and slowly took classes on our own. The trainee I was paired with had a similar educational background to me and we got on really well.
The actual teaching was pretty minimal, I did two placements and had at most 3 classes to teach on my own, but made up for it by having to do absurd amounts of paper work. I'm talking detailed lesson plans, notes and evaluations for every lesson, amongst many other things we had to accumulate to show that we had met the various teaching standards. We also had to complete five written assignments throughout the year.
All in all it was difficult, behaviour was atrocious in the second school and at times I was seriously considering quitting, but just went with it in the end. Sometimes you'll get seriously annoyed with poor behaviour especially when you know your success depends on how well these kids are behaving (and hence learning), but getting annoyed is the worst thing you can do. Just stay calm, stick to your guns and wait for them to fall in line, even if it means half the lesson goes to waste. Once they realise that they can't get a reaction out of you and get bored of messing around, they will simply start doing the work. There will of course be the odd kid who never tires of being and absolute tit, but dealing with these individually is a lot easier (assuming your school pastoral system actually works).
Other than that, the best form of behaviour management is good lesson material, planning and delivery. You have to show them that you are confident and know your stuff. They feed off any sign of uncertainty and nervousness.
My NQT year wasn't a whole let better, even more difficult in some ways, but you just have to plough through it. It definitely gets better each year as you become more established and respected, but that is probably the same for any job really. Also not every school will suit your particular character and skill set. I currently work in a grammar school and really enjoy it there, but I know that's not the case for everyone.