It's a bit hard to explain - but I'll give it a try!
For every 'fact' - there is somewhere that it comes from. You have to get into the habit of always thinking of them together, and putting them down on paper together.
Regarding 'problem' questions - ones where you are given a legal scenario and have to explain what the legal position is - it helps to think of it as a flow chart.
You start at point A your scenario. What is the area of law you are looking at - identify it (not always easy!!)
- what are the various options from that point? (List them in your answer)(Each option has some law as 'proof' - whether it be a statute, regulation, or case. So you have options B1 (Sec ... of statute ...) or option B2 (Sec ... of statute ...). You choose B2 - because it is fits that section better (and there may be case examples of other cases which match your scenario or closely resemble it).
Then you have a choice between C1, C2, C3, and you do the same thing - listing the 'evidence' alongside in brackets. (No need to give details, just the section and act, or the case name).
You do this all the way to the end, almost like a flow chart. You have to explain why you are choosing that path at all times.
Also, remember that you are looking at what is the most likely answer. There are not very many answers which will be absolutely right. So you should usually include something like 'it will more likely be' or 'based on the similarity between this situation and case X the ... is the most likely answer'. They can range from, possibly/probably, to highly likely, depending on how much case law there is in the area.
With cases, the scenario of the actual case is rarely what you need to focus on (although the scenario does help you to remember the case). It is the points of law which you need to remember. Your biggest clue is the handouts you will receive. Cases will be listed under headings, and it is that point of law which you are looking for. Cases can have several different points of law, so don't mix them up!
Make sure your personal notes cover these points clearly. I found setting it out in a table form helpful. Column 1 is the case name, column 2 is some details about the case (which will help you remember the case, or help you differentate it from other cases where there is a different judgement) and column 3 is the point of law. Put the heading from your notes in bold, then a brief little summary if needed (5 - 10 words usually) and maybe a quote, including who said it - (if you can remember the judge who made the point of law your answer will sound even better!). If your table is clearly set out, then you can even get a non legal person to quiz you on it to help you remember it for your exams (because this is the knowledge that you need to have in your head).
Hope this helps!!!!