Be accurate. Most of these skills could be done by anyone off the street, but as a geographer they expect a greater level of precision.
When mapping or precis sketching, use a definite border and an appropriate shading or pattern to fill in the 'blob'. A lot of people drop marks by showing an area as a scribble rather than an 'blob' with a defined border.
Remember there are no 'traps' or 'tricks'. They are not trying to catch you out. If it seems easy, it is probably just because you are good at it and you have learnt well. But remember to read questions very carefully. That is half the challenge of the exam really - reading and interpreting the question.
If asked to apply an IGI, it is usually easiest to use the IGI of 'Change'. As you can explain how change can be:
and then apply some examples from the resources provided.
SOFT K for Maps
Titles, even scale (all the way to zero, no breaks in scale), labels for axis, correct choice of graph)
Line Graph is used for things changing over time.