Can I fix DNS issues on MBP for good?

I noticed DNS issue on my MBP where all of sudden my DNS simply stops working. It's easy to notice that, so I do the following:

• first I check if DNS is really broken by eg pinging google.com, when DNS is not working, ping is not working either


• 
  

  then I execute the script with following commands:

  
  

  
  sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist
  sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist
  
  

This is all happening on MBP 2013 with Yosemite installed, sometimes more often, sometimes less.

Is there a way to fix DNS issues in more better, systematic, way; so I dont have to manually fix it by myself?