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