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