The line-counting strategy allows you to usually eliminate 2-3 of the answer choices.
Basic breakdown:
Top view - horizontal lines/breaks associate with vertical lines/breaks on end view; vertical lines/breaks associate with vertical lines on front view
End view - vertical lines/breaks associate with horizontal lines/breaks on top; horizontal lines/breaks associate with horizontal lines/breaks on front
Front view - vertical lines/breaks associate with vertical lines/breaks on top; horizontal lines/breaks associate with horizontal lines/breaks on end
I think that's right...if it's not, someone correct me before sexydmd screws this strategy up...lol
After this, you should be able to eliminate 1-2 answer choices. Look at the remaining answer choices and see what's different between the 2. It's usually one line (solid or perforated). At that point, it should be pretty easy to differentiate which is the correct 2D depiction.
If you struggle with this still, have someone who did well on the PAT guide you through what they did on the top/front/end section.