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