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