For clearing out bad energy, Native Americans have traditionally used sage smudge sticks. Palo Santo, meaning Holy Wood, is a South American scent made from a tree that has cleansing and healing benefits. Frankincense and sandalwood are also used to make way for good vibes.
If you want to enhance your meditation practice try relaxing scents like lavender, sandalwood, patchouli or nag champa. Several different aromas are used in yoga practices for grounding, breath, focus, etc.
Finally, studies have found carcinogens in incense smoke so it’s not something you want to be exposed to 24/7. For the healthiest possible incense burning experience, crack a window and buy high-quality, all-natural products. A few places to start are Incense Warehouse for a huge selection of everything; Shoyeido for Japanese incense and Auromère for Ayurvedic.