English Thread

In this thread, we attempt to learn to read, write, and speak English, a language which would be very useful to know. It is widely spoken throughout the world.

Do you speak English? Are you fluent? What resources did you use to learn? Can you give some examples in this thread? Posts some useful links.

Let's help each other out and learn a new language.

Greeting!
While watching Jigoku Shoujo I heard the protagonist girl say - "...However, you will have to deliver your end of the bargain" - in the 1st episode. In all the following episodes she was saying that same phrase with ON-preposition before "your" like "deliver ON your end of the bargain.
So I was wondering if both those variants are OK and grammatically correct? Google says both of them actually take place in speech. What do you think, anon?