I use lemon EO a lot! Skin care, cleaning, deodorizing..the list goes on and on. This is another scent that just makes me happy as soon as I smell it. It pairs well with a lot of different oils so it's in my diffuser a lot. Here are a few suggestions of how you can use lemon EO.
Sometimes I notice that even though I vacuum the carpets they still get a musty smell. It may not stink up the whole house or anything but if I workout or do yoga I will sometimes get my face close enough to the carpet to know that it doesn't smell all that great...
Orange essential oil is another popular oil I use. I love the smell of an orange and diffusing it's EO makes your house smell so fresh and clean. I feel like it boosts my mood as soon as the scent reaches my nose. Here are some ways you can use orange EO.