[blueump]

Here's my method:

I fold my 3x5 in half and then divide the half card with a vertical line down the middle (making two columns). This 1/2 card fits easily in the palm of your hand and you can easily signal without the obvious visibilty card showing. The line-ups are written down each side of the columns keeping each team on their correct side. I check the number of the previous server against my card- keeping in mind that the server and the two players listed above her on my card are in the back row, the 3 players below the server are in the front row.

The only thing I write on my card are substitutions (crossing out the previous player's number and writing in the new player's number) and timeouts. I don't keep track of score, serving, libero or anything else.

It doesn't work for everyone, but it works for me!