While writing your experiment procedure, you should avoid being too brief; otherwise, you might give up clarity.
You can provide labelled diagrams or images of the exact set-up necessary for experimental equipment.
Does it seem like all your collected data will fit cleanly into the Data Table? The prelab generally would go after the Procedure, unless your teacher told you to put it somewhere else, such as at the end.
Make sure to use the correct number of decimal places, and always put a unit like cm for centimeters after every single number.
The reader wants to know what you did, how you did it, what problems you encountered and finally what your results were.
Be sufficiently detailed that anyone could read this section and duplicate your experiment.