Have a De-Clutter Party!
This summer schedule a day on your calendar to have a de-clutter party. Invite family and friends and ask everyone to bring at least 3 things they no longer need or want. These items can be placed in a large box and then donated the next day to a charity organization. Many charity organizations will actually do home pick-up, so check with those organizations in your area.
This is a great way to get organized, spend time with the people you love and help out those people that are less fortunate.