How I studied for the recent half-yearlys plus tips on how to perform best in the Mod Hist Exam.
CORE
Learn the course at a superficial level with a focus on gathering token facts to include in Q2 that requires "your own knowledge"- example: token fact for women in WW1- in britain their were 6 policewomen in 1914, a number which grew to 650 in 1917.
Practice past papers. And get hold of that book which has borderline sample exam responses for modern history (standards packages?).
The structure of section 1 is very simple and by figuring it out, you can apply the question formats (ie: identify, analyze, purpose, usefulness, perspective) to any sources in your textbook or otherwise. If you have an equally keen class-mate you could write practice section 1's for eachother.
NATIONAL STUDY (the question that is not on personality).
Learn the course. I did this by making notes from a textbook on Germany (my national study). Also do this with a focus on the syllabus dot-points.
Practice essays- closely examine past papers (and syllabus) and figure out the main characteristics of the questions that get asked- from this you can formulate your own questions once you have used the pastpaper ones. Do the practice essays under exam conditions- ie: 40 minute timelimit (or whatever it is).
Also, if you don't have the time to write full practice essays all the time, it's useful just to write introductions. What I mean by this- Just look at the question, do a plan and write an introduction in 10 minutes. This is good practice for responding quickly and logically to a question you've not seen before without getting flustered (essential skill for exams!). For this exercise you could use these questions:
http://www.boredofstudies.org/community/showthread.php?t=32649
It is also useful to have practice essays checked by your teacher or another Modern History teacher.
I wouldn't call modern history an easy course but the exam can be very prepared for.