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