What is the best and easiest way to beat legend of Zelda ocarina of time?

There isn't really a "best and easiest" way. Just follow the story. If you skip a dungeon, as some people have, you just have to go back to it later. Plus, it doesn't make it easier to skip ahead, since it just causes more work. So, I guess the best and easiest way is to, as I already said, just follow the story as you are supposed to.