For toe I have a bit of string tied between 2 axle stands going from the front to the back wheels, and I line it up so that it is parallel with the sill under the door. With the string parallel to the car it is easy to measure the difference between the front of the wheel and the string and then the back of the wheel and the string.
Also when you are adjusting the toe put an old magazine cover or something under the tyre so that when you turn the tie rod to adjust it the tyre you want to move is the one that does the moving.
For camber I have a spirit level with angle adjustment (plastic thing that cost $4) and place this up against the rim...
For castor I turn the wheel to full lock and measure the camber change...
I've done this and then used bob janes to check it all and it was spot on...
