Think this tip will be helpfull to others.
Put this lines into .vimrc ,
noremap L f$
noremap H F$
Now press Shift + l to jump to next $variable
Shift - h - previuos variable
Comments
Note that L and H are already mapped. L will take you to the last line in the window, H to the first.
You may want to use a different mapping. I've found that almost all of the normal and capital letters are already mapped, so you'll probably need to use the ctrl or meta (alt) key, or some key sequence (<leader> may be useful - see :help mapleader)