Got grease stain out of my shirt!

I wish I could remember which website I found this idea on but I searched so many I can't remember now. But this is the tip that finally worked to get a butter stain out of my shirt and it was so simple and easy: Just put some shampoo and rub it into the stain before washing. It really did take it out the first time and that was after the stain being washed a couple of times using other tips trying to get it out.