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