This spell derives from petitions to the orisha BabaluAyé and is believed to bring good luck. If you incorporate spiritual petition, the luck might even be greater.
1. Nail a slice of bread behind your front door
2. Tie a purple ribbon to the nail
3. Replace the bread once it begins to rot rot or deteriorate, burning the old slice
( For hygiene reasons I don't think you should have rotten bread on the back of your door. And people might think your strange for having it there, and besides, a grilled cheese sandwhiches would probably taste and smell nicer)