Make it easy. Work smarter not harder.
You already know where you are going, right? I mean you filed it you ought to. Why waste time writing it in when they are reading you the clearance? Write it in before hand. Same thing with the departure frequency. Its on the approach plate, just look at it. 98% of the time it is going to be the same, but every once and a while they change it. Thats good enough odds for me, so just write that in before hand as well. Check fltplan.com (or even use it to file your flight plan) and see what others have been using for a routing between the two locations and file that. Once you get good at it, you are much more likely to get "As Filed" instead of "advise ready to copy full route." Fill in the altitudes and the squak codes, read it back and you are good to go.