Here is a tutorial of mine
http://www.bushcraftuk.com/forum/showthread.php?t=18785
It shows a dehydrator but its easily adapted to an oven - it shows all the basics
Cut into thin rectangular slices with the grain and usually marinaded overnight....
Have you ever tried cutting it across the grain? It's makes it easier to chew, especially if you tend to make 'very' dry jerky, for longer term storage purposes.