Hi, I saw a TV documentary on sleep which said something along the lines of 10 minutes nap was useless, 2 hour nap was not good for you -- left you feeling groggy but a half hour nap was just right -- refreshed you without affecting night time sleep. (You could probably find references to the study on google) So perhaps you could set a kitchen timer for half hour and just give yourself permission to relax --even snuggle up under a quilt?