Greg Bender
http://www.thisoldtractor.com/gtbender
The easiest way that I've found to lube cables (throttle, clutch, choke, brake, etc.) is to use a small device made by Champions Choice Cable Luber. The kit includes a special adapter that clamps around the housing of the cable. Then, just attach the nozzle from the aerosol can and watch the lube come out the other end of the cable.
John Prusnek has also recommended the use of a ziplock bag and a rubber band.