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