DEAR HELOISE: With spring cleaning and quarantining encouraging organizing the home, there's one area many haven't thought about: How to preserve your most treasured memories for generations to come. From ticket stubs to letters, the items we care about will tell stories for the future and represent our personal history. The National WWI Museum and Memorial's exhibit "Why Keep That?" explores the journey of a donated item to a museum, and the museum wants people to know how and what to keep when cleaning their homes so their keepsakes can continue telling stories in years to come.