Here is a relatively easy and long-lasting charm using cloves.
First, soak fifteen or twenty cloves in warm water for one hour.
Using a needle, string the cloves on a red thread.
You can hang the string in an inconspicuous place, or, alternating the cloves with beads, you can make it into a pretty necklace.
Tie the thread and hang it up to dry.
It will give an interesting spicy smell to your house, and also ward off evil spirits.