Show Others Your Tricks in the Creative Field

This may be an area where it may depend if my advice is good or bad.  I don't want to superimpose my ideology on this subject since it isn't always the case.  When it comes to what you know, I always am of the opinion that you should show others your tricks.  I am competitive guy, but I think being competitive should be beating someone working your ass off rather than being the weird, I'm not going to show you anything since you're my enemy.  Friendly competitive creative work is always best, especially since you have a more positive attitude on this subject.

a really bad & cheesy helping hand photo

You know some Photoshop tricks?  Show them to someone you either work with or that asks for it.  Someone who could do the work a bit faster in AfterEffects if they tried using the hotkeys, show them.  In group projects, this will always be beneficial since your co-workers will know more and do the work more effectively (and likely better), which means you all benefit.  They will also appreciate you more and the working environment is much better.  If they are decent human beings, they will help and show you their tricks so you can also improve yourself.

The only situation that I can think of where it would be a bad idea to show someone your tricks is to an asshole.  Someone who has a metaphorical knife that they constantly try to stab you in the back with and will use anything against you.  In that case, the obvious answer is not to be so forthcoming in regards to showing your tricks.  Again, this is my outlook on this but there's plenty of professionals that are more reluctant to help others, and I can't put their ideals down.  That's their outlook on this subject, and this is mine.  You have to choose yourself what type of person you'd like to be in the creative world.