[manmal]

Threads like this one seem to be a good starting point: http://forums.longhaircommunity.com/showthread.php?t=68552

Although I must say, advice like this:

  if your goal was to go product free (as in chemical free) you can always try Water Only but instead of baking soda you can try doing the egg 'shampoo'. You take one egg, one tea spoon of honey and one tea spoon of extra vigrin olive oil; mix that up very well as in whip it and then add few drops of lemon or lime juice. (if you have dark hair I would suggest heating up the oil with honey in the microwave for 30 seconds. Just make sure it cools off before you add it to the egg). 

is not exactly my cup of tea :)