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