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