Every time there is a flight planning question, run through:
A - Aids
C - Clound
V - Vis
W - Wind
P - Provisional
L - Ligting
S - Storms
Which the numonic is: Alternates could very well prove life savers. If you methodically go through every question in this manner, you should have a fair chance. Tag your documents as well for speed of access.
I remember the 2 questions i got wrong, both related to the MDA. In Bob Taits book which i used and highly recommend, he had a couple of trick questions with the QNH. If you have the QNH for a location and the charts box is shaded, you can subtract 100 feet of the MDA. BUT in Bobs book he said that if the question didnt mention that you had the QNH assume the normal MDA, which i did and got them wrong. I should have subtracted the 100 feet as the plates had AWIS available on them.
BUT thats casa exams for you.
Go to the bob tait website and buy some cyber practise exams, i did and highly recommend them.