Shen tips for a noob?

So watching some Worlds, seeing Shen used to do some cool things. (Admittedly, it seems to be more the pro teams not respecting Shen's ult in fights, but still) Anyone care to give a noob some tips? Obviously, 'keep an eye on the map' and 'know if your ult can really save your teammate, or if it'll just give the enemy an extra kill'. But are there any other tips or tricks to share?
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