Take out the trash. Even though the smell your looking for might not be coming from the trash alone, it is a contributor. Taking out the trash daily will help to eliminate nasty smells.
Keep your kitchen sink free of dirty dishes. I’ve noticed that if we have something like Caesar salad for dinner or tacos, the house picks up the smell. As soon as you’re done eating rinse and load the dishwasher or wash the dishes by hand.
Vacuuming regularly will help decrease the smells in your house. Dirt and dust get trapped in your carpets which can then start to smell. If you have pets in the house, you may need to vacuum every day like I do.
Clean your vacuum filter regularly. Most vacuums now have washable filters. Keeping your vacuum filter clean will eliminate smells that can come out of it while vacuuming. As a bonus, your vacuum will work better.
Wash throw pillows and blankets weekly or at least every other week. Because we have pets in our house, I wash ours weekly. They pick up a nasty smell from the pets and kids, not to mention the pillows get very dirty.
Wipe your kitchen counters down daily. I have an awesome smelling spray that I use on my kitchen counters multiple times a day. It makes the whole kitchen smell amazing and cleans away food and cooking mess.
Change your air filters regularly. It’s hard to remember sometimes since your HVAC unit isn’t in plain sight, but your filter should be changed regularly. A dirty air filter not only smells bad but doesn’t clean the air as good as it should.
Use smelly products. I couldn’t think of a better way to put this but use candles, wax melts, essential oils or plugins to make your house smell good.