Reducing Flash card writes on RPi Raspbian

1. Disable the swap file
   $ sudo sphys-swapfile swapoff
   
2. By modifing /etc/fstab, mount busy folders on external samba storage
   
   • /home/user/Documents
     
   • /var/www
     
   • Selected folders on /var/log e.g. Apache2, custom cron
     

   proc            /proc           proc    defaults          0       0
   /dev/mmcblk0p1  /boot           vfat    defaults          0       2
   /dev/mmcblk0p2  /               ext4    defaults,noatime  0       1
   # a swapfile is not a swap partition, no line here
   #   use  dphys-swapfile swap[on|off]  for that
   
   //storage/apps/rpi/www/ /var/www/ cifs credentials=/home/john/.smbcredentials,uid=www-data,gid=users,file_mode=0755,dir_mode=0755,iocharset=utf8,sec=ntlm 0 0
   //storage/apps/rpi/log/apache2 /var/log/apache2 cifs credentials=/home/john/.smbcredentials,uid=root,gid=adm,file_mode=0755,dir_mode=0755,iocharset=utf8,sec=ntlm 0 0
   //storage/apps/rpi/Documents   /home/john/Documents        cifs    credentials=/home/john/.smbcredentials,uid=john,gid=john,file_mode=0755,dir_mode=0755,iocharset=utf8,sec=ntlm 0 0
   //storage/apps/rpi/log/cron   /var/log/cron        cifs    credentials=/home/john/.smbcredentials,uid=root,gid=adm,file_mode=0755,dir_mode=0755,iocharset=utf8,sec=ntlm 0 0
   

   Do 'sudo raspi-config' and make sure 'wait for network' is enabled for boot.