All right, I have a notepad full of stuff where I keep most of the important NPCs and quests stuff just in case I need them... then I realized "Hey! I'll just post this up for everyone else!"

Note that a bunch of this stuff is just random helpful stuff and it really only covers Windurst and a few other things. Feel free to add in your own notes!

Helpful Keystroke/command Shortcuts:

Ctrl+R = Set "Tell" to last person who messaged you, hit again to cycle through people.
F8 = Targets closest NPC
/cm s/p/l = Set your chatmode to "say", "party", "linkshell".

Windurst Stuff:

Cornettes = Quest that increases fame and gives you 200 gil in your pocket. Mandragora and a market in Bastok sells them.

Rottata (Port Windurst D-5) will teleport you to any Outpost that you have sent supplies to. 200 if under your Nation's Control, 1000 if not.

There's are 4 NPCs in Windurst that can warp you to a Windurst section that cannot be reached without going through another section. They are...

Woods - Waters (Windurst Woods, near Chocobo Stables)
Waters - Woods (Windurst Waters, near... that building dealie)
Port - Walls (On top of the Magic Training Building... forgot name)
Walls - Port (On top of the AH in Windurst Walls)

Give a Lilac to the Mithra Girl at the Windurst Walls Residental Area so you can exit through any Mog House.

AND MORE?!

A lot of you probably already know this, but some might not and I like helping others so:

Another windurst quest:

In the magic school back in windurst waters (if you leave the residential area and run straight it's right there at the end on the right) there is a guy who will give you 250 gil for a bird feather and a 2-leaf mandragora bud and it's repeatable

Abrocious in front of the auction house in Windurst walls will say that a mailman has been attacked and ask you to collect mail for him. 1 piece of mail is worth 50, 2 for 150, 3 for 250 and 4 for 500 and it's repeatable.

if you want to check someones level to see if they would be good for your party you can type in /sea all personsname and it will show you thier basic info. You can also type in /sea all whm or /sea all whm lvl 14 and it will show you all of them.

if you type /emote and then anything after it will put it in that purple action color. So if you type /emote steals 200 gil from you. It will actually say Frums steals 200 gil from you. This is a very good way to spot new players because they will believe it :)
One guy asked me how I did that when he didn't even have 200 gil.