The memory aid I use for crimping Cat 5 for 10/100 base T.
First arrange the wiring in the following pattern:
GREEN BLue Orange Brown

Always alternate between colours and trace.

So after arranging you should have:

Green GreenTrace Blue Bluetrace Orange OrangeTrace Brown BrownTrace

Next swap the OrangeTrace, and the BlueTrace, to end up with:

Greeen GreenTrace Blue OrangeTrace Orange BlueTrace Brown BrownTrace

giving the optimal configuration for 10/100 baseT transmission.

Crimp, and serve with fresh parsley, on a bed of hot pasta.

Note that this is not the same colour pattern as the IEEE standard wiring spec, but it is the same wiring.

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