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