give yourself a proper break, with no worries about what you ought to be doing, you will then come back revitalised and ready to go, and what is more you will probably find those little grey cells have been working all the time, just in secret, and the minute you are ready to start again they will spring into action and give you loads of new insights etc. So no slappage, a nice pillow to curl up with, a nice cup of something, a favourite biscuit ot two/ a film/indulging in a hobby or something for a while will do you the world of good, you will soon get back into wanting to do some work, be like the bunny in the caramel advert, you know it makes sense! :-)