Do you see those solid lines? You're not supposed to cross them. Most of those solid likes are used to mark spaces to park. They are generally arranged in such a way to create aisles that you can drive your vehicles up and down. If you see a place in the parking lot that you want to be, you can find a way to get there from where you currently are that does not require that you cut across any solid lines. Not only is it common courtesy, in some places it's the law and you can be fined for every solid line you cross. Please do everyone a favor and follow the traffic flow that is implied by the solid lines. No more cutting across the parking lot to save a precious two or three seconds. The only exception to this request is if you want to "pull through" a parking space so your car is ready to leave the space in forward instead of reverse. However, this only applies to "straight-in" parking -- "slant" parking requires that you not "pull through."
Do you see those arrows? They're often used with "slant" parking to indicate the direction of traffic flow for each aisle in the parking lot. Please follow them. Often the aisles are only wide enough for one-way traffic, and these arrows are used to indicate the proper way you should travel in each particular aisle. If you "pull through" a slant parking space, your car is guaranteed to be pointed the wrong way in a one-way aisle and you've just violated both of these common-sense requests.
Please do us all a favor and abide by these common rules of parking lot etiquette.