When I started my car today (MY02), on idle, it sounds like it miss-fires every now and then. Only did it a few times, then the car was fine.... but when I started it again tonight, it done the same thing, this time though, the motor would have been around running temp (was cold when I had started it earlier in the day) Car seems to go fine while driving.

Now Im assuming I should check the plugs, my first question is, anyone got any helpful hints at getting to the plugs? I know where they are, but they look like a pain in the ass to get to. Also, any other suggestions on things to look at? (also how in the world do I test if the problem is a plug or something else, other than swapping them out?)

I should add (if it makes any difference or not) that the car has done around 80,000km with the current plugs, so they arent exactly new.