Sleeping on terrible mattress means tossing, turning with very little REM sleep. Which also means it’s time to shop for a new mattress. I have to admit that mattress shopping has come so far since I last bought one.  You can research them online now, watch videos and order from the comfort of your pajamas and couch, which means that you get to avoid that awkward test phase cat and mouse game that occurs in furniture and mattress stores.  I recently read an article about selecting the right bed and the experts interviewed suggested that we try each mattress for a minimum of 20 minutes and test it on both…