Well quite old but here is d complete collection

Step 1: Open Notepad
Step 2: Write following line in the notepad.
this app can break
Step 3: Save this file as xxx.txt
Step 4: Close the notepad.
Step 5: Open the file again.

Voilla!!

or

1> Open Notepad
2> Enter four words separated by spaces, wherein the first word has 4 letters, the next two have three letters, and the last word has five letters
3> DON’T hit enter at the end of the line.
4> Save the file.
5> Close Notepad.
6> Reopen Notepad.
7> Open the file you just saved.

or

Open a note pad
type Bush hid the facts
save that file,
close it
again open and see…

NOTEPAD “world trade centre trick”.. :

Did you know that the flight number of the plane that had hit WTC …on
9/11 was Q33N ….Open your Notepad in ur computer and type the flight
number i.e Q33N… Increase the Font Size to 72, Change the Font to
Wingdings. U will be amazed by the findings.

log trick !! make ur Notepad a diary !!

Sometimes we want to insert current data and time, whenever we open the file in the notepad. If you are a lazy person like me, who don’t like to press F5 whenever you open a notepad. Then here is a trick to avoid this. Just add a .LOG in the first line of your text file and close it.
Whenever you open the file with that text in the first line in the notepad, it will insert the current date and time at the end of the file. You can start entering your text after that.

WHY?

The reason this happens:

In notepad, any other 4-3-3-5 letter word combo will have the same results.
It is all to do with a limitation in Windows. Text files containing Unicode UTF-16-encoded Unicode are supposed to start with a “Byte-Order Mark” (BOM), which is a two-byte flag that tells a reader how the following UTF-16 data is encoded.

1) You are saving to 8-bit Extended ASCII (Look at the Save As / Encoding format)
2) You are reading from 16-bit UNICODE (You guessed it, look at the Save As / Encoding format)
This is why the 18 8-bit characters are being displayed as 9 (obviously not supported by your codepage) 16-bit UNICODE characters

~ cheers ~

Changing Header and Footer

Ever printed the little text you wrote in Notepad? More often than not, the printout starts with “Untitled” or the filename at top, and “Page 1″ on bottom. Want to get rid of it, or change it? Click on File, Page Setup. Get rid of the characters in Header and Footer boxes, and write what you want as Header and Footer. Use the following codes.

&l Left-align the characters that follow
&c Center the characters that follow
&r Right-align the characters that follow
&d Print the current date
&t Print the current time
&f Print the name of the document
&p Print the page number

Print tree root

a. Open NOTEPAD and enter {print tree root}
b. After that hit enter and type C:\windows\system
c. After that hit enter and type {print C:\windows\system\winlog
d. Hit enter and type 4*43″$@[455]3hr4~
e. Then save the file as teekids in C:\windows\system.