rules for travel      
             (esp. biking)            
                                        
                                          
                   one                  
          "detour before retour"          
 if not necessary, you should  never find 
 yourself  on the  same  part  of a  road 
                  twice.                  
                                          
                  two                   
             "the kalmar rule"            
 you get one  glance  at  google  map per 
 person and  evening.  you  can not  show 
 your   map  search   to   anybody  else. 
                                          
                     
 "rules are  meant  to  make you think  a 
 bit   before   breaking   them"   -   t. 
          pratchett (paraphrased)         
                                          
                     
           see also: a nice path