I just start (and close down) Acrobat Reader 8 when I first start up the machine. Whenever I need to view a PDF I don't notice the start time at all, a 6MB PDF opens in under a second.
Having lots of free memory is useful.
Also, since this is a work laptop, I'm expected to install any appropriate updates. If it wants to update then I let it, and get on with something else whilst it does. That way I'm not constantly badgered by update boxes.