If you download hundreds of short episodes videos or movies in rm format and tired of double-click to open next files. You can Use notepad to trick it and make easy to open a new file:

file://link to file1
file://link to file2
Type as many files you want. Close file and rename it to YourFileName.rm. For example: [...]

Here are some trick using your notepad to test your antivirus. Firstly, Open notepad and paste this:
X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
Then save it as eicar.com. Your Anti-virus will then either not let you save it of when you have saved it will remove it for you. Dont worry about it. Your pc not crash. European Institute for [...]

Easy and fun trick with your notepad. Lets try, now open a blank notepad file:

Write .LOG as the first line of the file and press enter.
Save your notepad file name and close it.
Double-click again your notepad file to open notepad and opinion added that the date and time at the end of the file..WOOT [...]