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