It is like getting used to a front tire as it wears down, and then getting a new tire and discovering what it should feel like.  If you haven't lubed your clutch cable for a couple of years, you may be in for a very pleasant surprise.

I just got this Lube kitin the mail yesterday!  What lube did you end up using?  They just use Lithium Grease at this motorcycle shop next to me but I wanted something that was gonna break up the current dirty first so I decided to go with this lubricant.

I bought my cable luber at the local motorcycle shop, and it included the cleaning/lube spray and the attachment for the cable end.  Attach it, give it a 3-5 second spray.....job done.

http://www.protectall.com/cablehowto.aspx

Also, you should remove the lever, clean the pivot bolt and bushing in the lever, then put a small amount of a light grease on the parts, and put them back together.  Same with the lever on the master cylinder for the front brake, and the rear brake foot pedal, cable and shaft in the rear brake pedal....and the foot shift lever and linkage.

These parts are often overlooked.......and you really should be cleaning and lubing them once a year at a minimum.