Whats the easy way of taking out spark plugs?

I just bought new NGK spark plugs to put in my GTP, but I'm having a hard time trying to take out the three plugs in the back of the engine. I had my car lifted up, but I can't seem to pull the plugs out.

This question has been answered before on this forum, do a search under "spark plugs" and I'm sure you'll find the answer...