Objects can have people and memories associated with them, and if these associations are sad, depressing, angry or make you feel bad for any reason, then get rid of those things. When you have items in your house that have heavy associations with them, a part of your mind feels the heaviness every time you look at them and it drags you down. Getting rid of these items is one of the quickest and easiest ways to feel better on a day-to-day basis.
Some examples of emotionally heavy items to get rid of, such as jewelry or gifts from old lovers or the bed you shared with an ex, are pretty intuitive and most people get rid of these naturally. Less obvious are items that have associations with people you love, but don’t make you feel good. For example, one woman I know always felt uncomfortable in her living room, so avoided it. She described the room as having fairly standard living room furniture and about twenty to thirty family photos on the mantel and piano. After some questioning, I realized the photos made her nostalgic and sad about the passage of time. Though she is quite close with her children who are now adults, and doesn’t want to go back to the times captured in the pictures even if she could, the photos made her sad. I suggested she box up the photos and put them in a closet as an experiment to see if it would make the room feel better. She put the photos away and was amazed at how much lighter and more enjoyable the room felt. You know there is no rule that says you have to have pictures of your kids or relatives or any other thing in your house. If something makes you feel weird, for whatever reason, then get rid of it. There are social conventions about what the house of a good friend, mom, partner, etc. looks like, but these are just imposed ideas that you don’t have to follow. If something makes you feel heavy, get rid of it!
If you feel too attached to an item that you think you should get rid of, put it in a box in an out of the way place and see what it’s like to live without it. Most people find they don’t miss the object at all and end up getting rid of it.