To be honest, the most efficient way to solve these is to eliminate the wrong options. What I usually do is write A B C D E on my page and cross off the incorrect ones as I go through them. Usually you can eliminate at least two of them and the other three you really gotta think and look at the fine details. This is probably your best bet. The DAT keyholes are much easier, but there are a few tricky ones - BC PAT will come in handy for those.
Just go straight to the answers and try to eliminate the ones that do not look correct, using the same view. For example, if you looked at A and saw that it was the top view, look for other top views in the answers and try to eliminate many answers at once.