My favorite scent is lavender. I burn lavender candles, use lavender soap and lotion, diffuse lavender oil and spritz my rooms with lavender spray. I used to spend about $10 for a bottle of room spray at my food co-op. But now I make my own for a couple dollars, at the most. The recipe is easy and found all over the internet.
Lavender Room Spray
1 1/2 tbsp vodka
6 tbsp water
10 drops essential lavender oil
spray bottle (mine is a recycled bottle from the spray I purchased)
Pour all ingredients in bottle and shake.