I found a seed in a seedless pink navel orange and want to plant it. Does anyone have any tips on how I should go about this? Thanks, Linda

Well... what tip you prefer?
Simply, seedlings will endure a very long periode of juvenility, with no flowers and no fruit... So you will have for a very, very long time a nice a citrus tree, which does look like any other navel orange tree... so the pink flesh wouldn't be worth consideration, only worth to remark it... to remember if once fruit will come.
Cultural practics are the same as for any other seedling...