A few weeks ago I splurged on 620 thread count sheets at Bed, Bath & Beyond.  I had a 20% discount coupon, so I had no qualms about treating myself...I finally washed them last weekend and slept on them for the first time last night.  Maybe it's my imagination, but I slept more soundly and had some really sweet dreams.  I don't get enough sleep, so I pamper myself whenever I can!