Hello,
I have a small chart that I photocopied out of a book that I got, which is taped infront of where I work. Lots of similar ones on the net with the Freq + Note per Octave. Its really the quickest thing I find.
However, something that might help everyone - is a Free Plugin called Span by Voxengo. Its a Spectrum Analyser that gives you a reading of Freq & Note per Octave.
Simply hover the Mouse Cursor over one of the Peaks in the Waveform & it'll give you a reading.. even in +/- Cents. Theres a Hold function that allows you to freeze the movement in the reading to take a closer look. Pretty handy.
I'd recommend going into Lo_Freq or Lo_Fi Mode (cant remember what its called exactly now..) as it gives a bit more of a magnified view of the peaks. I find this Plug great for checking anything really, but it gets used the most on the Drum Elements. It totally has changed how I work.
I've got one on my master & opened on my 2nd screen permanently. When I want to check something, I solo it. By looking at the Note & Cents of your peaks (and using an ear sometimes... LOL ), you can nail what you are trying to do very quickly.
Heres a link to it:
http://www.voxengo.com/product/span/
I know Ableton has one on its Spectrum Analyser, but this is far better in my opinion. The GUI is just a lot easier to view.
Cheers,
J