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