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