Fastest way to transfer my data?

I would like to transfer at least 300GB of data from my Macbook Pro to my new iMac, if not all of my 700GB. The Macbook Pro is old and only USB 2.0, so it's slow to manually transfer everything. Transferring through wifi is also very slow. I have the space available on my new computer, I'm just not sure of the fastest way to do it.

I do have a Time Machine backup of the Macbook Pro. Is that the fastest way to transfer my data to the new computer? If so, how do I do it? I've never had to use...

Fastest way to transfer my data?