Remote desktop over internet setup help

Hey folks!

I want to set up "Remote Desktop" on my computer at home and at work over the internet.
Both machines are running W7 professional. I have Verizon FIOS both at home and at work (separate accounts and wiring).
Although home and work computers are located only 800 feet away on my farm, I do a lot of work at home and want a simple way to keep things in sync.
My line of thinking is that if I can do all my accounting work all on the home computer either at home or remotely it would be simpler to keep it all straight.
I attempted to set this up myself using the Microsoft guide I found here... Allow Remote Desktop connections from outside your home network

I've re-traced my steps a number of times but always with the same result, no connection.

Any advice on how to set this up or a better way to accomplish my goal?

Thanks!

You should definitely check out TeamViewer (it is free and much better than RDP if you ask me).
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That link you gave looks comprehensive, but to reduce complexity try RDPing from within the local network first. You can temp move your other PC/laptop or use a smartphone (all have free RDP apps I believe).