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