DD and I have just shredded (by hand!) about 5 boxes of paper work, mainly bills, old insurance policies, tax returns, parking fines all dating back to the late 1990s, many tax returns (one from 1992!). Worst was the bank statements though, I swear I've kept Every Single Bank Statement from '95 to 2011, there were hundreds of them.
So how long do you store bills, financial documents, letters etc? Because I don't want them to accumulate like that ever again.