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