I used to keep a few sets of multi-colored markers around for the sole purpose of coloring all the tape on fingers and wrists the "appropriate" color each week. I also used to have different colored 3/4 sleeve shirts to wear underneath my jersey, which itself would have the sleeves pulled up into my armpits and rubber banded into place with as much of the undershirt sleeve showing as possible.
Odd phenomenon: Because I'm right-handed the tape on my left hand would always be neat and tidy, while my right hand would still have marker scribbles on it for days after I took off the tape.