Here are some tips. PRINT OUT THE SYLLABUS AND HIGHLIGHT THE **** OUT OF IT. With the textbook, make notes on EVERYTHING and try as many interesting questions as possible. The answers are in the back and your teacher should be able to tell you how to do the questions if you are stumped. Make sure you keep track of all the equations and information that you will not have come exam day and study it inside and out.
Next: get the questionbank. It's on the Internet somewhere and contains...hundreds of IB questions. And just do the ones for each section you are on. The whole point is...have the skill to do them and then use them for practice. You'll find that after you do a couple, you will be a PRO at a certain section. As well, practice the multiple choice questions for each section...keep track of the ones you get entirely wrong and get someone to help you understand why a certain answer is correct.
So...for labs:
http://hrsbstaff.ednet.ns.ca/gossesf/IB%20Physics/2010&11/IBPhysics%20HL12%202010&11/Curriculum.pdf A temporary link for the curriculum document. Print this baby out. Go to Group 4: Internal assessment criteria + Clarification of the IA Criteria and make sure your labs meet every single one of these outcomes without ERROR. I almost aced my labs for IB physics by doing this!
I didn't have this when I went through IB, but here's something also:
http://hrsbstaff.ednet.ns.ca/gossesf/template/Internalassessmentguidelines.pdf that my former teacher made up. This should help you a lot if you are taking IB physics.
Another tip: Learn your options well. If you have Optics...it's a tough deal. If you have relativity, it's fairly simple in HL because you have 99% of the equations and just need to know the concepts. The questions are LAUGHABLY easy for relativity in IB. For exams, you are ideally looking at this for your studying: a couple of weeks studying the AHL and Core stuff so you can do the problems and multiple choice questions. AND CRAM THOSE OPTIONS IN THE NIGHT BEFORE. This is what most people do, but this is all contingent on your learning the concepts well beforehand.
So, one last thing: make sure that your teacher is covering everything in a decent amount of time! My teacher finished around...March or something like that, and spent the last few weeks reviewing and doing labs and other IB things. Other teachers are not like that at all...you need a number of months to understand the concepts before you go into final study mode. And don't neglect any other science you might have: I neglected Chemistry SL and received a 4 as my final mark when I had level 6 labs. :P
IB really evaluate EVERYTHING on the final exam, so no chapter is unimportant. Just do them all like this!
There you go, and good luck with everything! If you need any sample labs and stuff, send a PM!