Stop screensaver in LXDE

You would think it would be easy to turn off the screensaver, which seems to be set at a default 10 minutes, quite annoying if you are downloading and/or watching something, but no there doesn’t seem to be any easy fix.

After trying a lot of things which didn’t work, I found the command:
xset s off

And that seems to do the trick!

So then how to make this happen on startup?