The musts I have read are:
Voice Recorder
Be ready to be hassled
Make sure you know your rights & what to say/not to say. Which ='s read up on here a lot more.
I just recently starting OCing as well, my CCW appointment is for the 30th, but I've been carrying openly thus far.
I'd definitely say to
read up a lot. I don't know how many times I've read the same material over and over just to remember it better.
Even at that, I've still asked some questions on here just to reassure myself that I was understanding it correctly.
Also something I personally did was write down ORC 9.68 as well as a couple others on index cards to read randomly...Or who knows, if I get stopped, I may be able to read it off to the LEO to inform him, who knows. Really, until I'm completely comfortable with it, I've been carrying those as well as page 17 (or 18?) of the CCW book in which it states the OCing is legal activity..Will any of this actually help me if someone hassles me...who knows. But it comforts me a bit more, anyway!
And yes, definitely get a recorder. So far I haven't had to use mine at all to defend myself...because I haven't been hassled yet..but anytime I'm out and about it's definitely recording. I was recommended this one by another member
http://www.bestbuy.com/site/Sony+-+...p?id=1218291943350&skuId=1792142#BVRRWidgetID and I'll attest that it is a great deal..the clarity is fantastic!
Good luck!