How Can I Open A Password Protected Rar File?

I have a rar file on my desktop which I created some 3 years back, and the problem is I don't remember what password I had kept for it. I have tried what ever I can think of but nothing has worked, its now been more than 2 weeks and Ive been unsuccessful opening the file.
Can anyone suggest how I can open the rar file or crack the password.

This will would quite impossible, seeing that you created the password yourself and dont know it, I dont think there is any way to open the file. If the file was downloaded from a site the souce is the password, but in this case its a personal file created by you.
There are software which break the password wall of rar files but they are paid one.
and if u download any password protected torrent (in most cases )the are fake one.