Top tips for PGCE students (and some general tips for all PGCE students):
First of all, I hope you are actually training to be a teacher because you want to, and already know this is the right thing for you unlike around 1/4 of the trainees in my group of 24. What a waste of time for them, already returning to their previous work etc.
1. Let your cooperating teacher know where they stand. When your teaching, for example a 50% timetable, let them know that for the other 50% that you will be OUT of the class and using this as PPA time. You don't need to be in the class, TAing. Get yourself out of the room and use that time wisely, because at this stage marking and planning takes more time than it should.
2. Get them assignments done and out of the way, preferably when you're not on teaching practice. Now is not a time to leave them 3000 words until the final week (or day).
3. Give yourself a full day off (Saturday is best) and ensure you set up a time to work at the weekend. Early birds will do it Friday night and others will leave it until Sunday. Either way, set aside a few hours to get things prepared for the following week.
4. I never got those people who claimed that they 'planned till 2am' and 'haven't seen their mates in ages'. Get yourself organised and motivated to get all the planning and marking mainly done and dusted at school and leave yourself minimal work to be done at home. Stick to this and your social life shouldn't really take a hit. BUT. Don't go out out on a school night, that's just stupid.
5. Early doors during your placement get these essential documents off your cooperating teacher:
Current NC levels of the students in your class
Their maths, reading and writing targets - these will be built into your planning to ensure that you are promoting and planning for progress.
6. Don't run before you can walk, or even crawl. Get help if you need help and don't be one of these people who claims that they can't get hold of their mentor or cooperating teacher. They will be within a 100m radius at most, so hunt them down and don't be afraid to ask (as for whatever reason a lot of PG student's seem to be) for help. You're TRAINING to be a teacher and they know this, that's why they're there - to train you.
7. Don't buy all them dumb 'essential texts' books that college tell you to buy. They will end up collecting dust. Instead, buy practical books that are going to help you with your teaching such as Pie Corbett's talk for writing.
8. If you get a moron for a mentor, who is really harsh when observing and lacks any qualities of being a normal human being, then let your college tutor know (the one who will observe you) to pre-warn them of their inability to be constructive. This will give your tutor a heads up and help to stick up for you should needs be.
9. Know the school's assessment policy inside out. Don't assume that you have to mark every piece of work in depth. For example, one of my placement schools only required one piece of quality assured marking per week.
Finally, just be motivated and organised. Stay on top of the workload and it will allow you to reap the rewards of being a teacher. You won't have to 'stress' about planning and other paperwork if you get into the routine of doing it and putting it to bed, obviously with commitment and not just doing it for the sake of doing it.
On a personal note, this worked for me 100%. I've just completed my PGCE. I stayed ahead of the game, and other trainees. Got a job teaching year 5 back in March and it was all down to my organised mentality. Furthermore, this will help you become a better teacher as you will be able to invest more energy into motivating and engaging your students which will create an amazing classroom environment.