We've all been there .. the truth is we all need a good nights sleep but unfortunately it eludes us sometimes. From a Design point of view I can steer you the right direction to help you sleep a little bit better.
1. Invest in a bloody good mattress .. the best you can afford, it'll be the best investment you can make for yourself. Be sure to try several beds in several stores. You'll be spending a lot of time in bed, asleep, so you really do deserve the best.