It is a hard lesson for those of us who have dutifully saved memorabilia and family heirlooms. Our attics and basements and under-bed- bins may be living a lie. The only way to know for sure is to ask the people for whom you have been doing the preserving. The truth can be hard to hear, but listen up. If the intended recipient doesn't even want his stuff, much less, yours, it's time to admit that one generation's heirlooms are another's junk. Your bounty may become their burden.