Making your own incense is essential. Only in this manner will you know what ingredients are contained within and why. A word or two of warning though — some incense blends can and do have toxic effects. A well ventilated space is essential. I have poisoned myself too many times when creating incense blends to achieve desired effects. The goal was achieved, although the vomiting and headaches that followed were not pleasant. Know what you are doing and be prepared should you get it wrong.