
Part of loving yourself is letting go of the old and bringing in the new; especially if you have a history of low self-esteem. The world is composed of energy. Matter is energy, you are energy, and the people around you are energy. Thus, all of the things in your home are (and have) energy as well. So go through all of your things, and make a purge of any possession that has a less than positive vibration.
Ditch the ex's old sweater
Rid yourself of the memorabilia from that friend that wronged you
Donate the socks or books, or bins, or whatever from that unhealthy period in your own life.
Don't cling to your past. Your past does not define you, and you must make your own identity. As you're purging, just reaffirm that you're ridding your life of past mistakes and memories and making room for new, exciting and beautiful things to come. It's freeing.