Remove any dead plants outside in your yard and replace with new ones. As soon as you enter your front yard there should be live plants and should invite you.
Keep good non-toxic and air purifying indoor plants inside home. Ferns, asparagus, money plant, orchids, ficus plants,Aaloe vera, aerophytes will purify home. If you have holy basil plant- take care of the plant well. Indians believe that holy basil brings fresh air more than any plants and it is also represents divine and spirituality.