Maintenance: what needs grease?

When you do an oil change and other routine maintenance, what all should you be greasing? I am buying a grease gun and know my universal joints require grease and probably lots of other things. Just want to maintain joints and not sure when/where I need to grease. Thanks!

 

There was a thread on here last week about how there's eight (no, nine!) zerks
on the driveline... I went out there and found and greased eight of them. There's
actually some 5 lugs that don't have any zerks, though... what is your truck?

Besides the zerks I learned (here and from the mechanic down at the shop) that
there's such a thing as hydro-lock on driveshafts... these trucks have slip-joints
in the drivelines and if you pump grease in those two places until it comes out
there's a chance of damaging stuff when the slip joints try to slip and instead
slam into non-compressible liquid (grease) ... Timmy talks about it about
four minutes into this video...

https://www.youtube.com/watch?v=Jyltxe2nPEg

-Mike

 

Totally depends on your truck style, which you don't mention in your profile.
My 2001 3.4L 4wd 4-door does indeed have nine, as mentioned in Post #2. Toyota even specifies moly in some of them and lithium in others.