Saving things that are useful, beautiful, and sentimental makes sense. What doesn't make sense is holding onto items that stir up negative emotions when you see them. When you walk by those dried roses that your ex sent you on your birthday do you remember what a great time you had that evening or do you think about your relationship with that person and the regrets and sadness that went with it? If they make you feel bad or sad, ditch them. I mean it! Throw them in the trash and I can assure you that you will feel better every time you walk past the wall that they were hanging on.
I have a homework task for you. Tour your home and look at all your "decorations." Take down/remove anything that stirs up negative emotion. Your home is your sanctuary and it should make you feel good about your current self, where you have been, and where you plan to go.