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