Pulling: Let’s say you have a terminal on your host open, you could do:
scp firstname.lastname@example.org:/tmp/myfile /tmp/files/myfile
This way you are creating a “second tunnel” towards your server.
Pushing: (The other way around) so from your server to your host (essentially it is now a tunnel in your original tunnel):
scp /tmp/myfile email@example.com:/tmp/files/myfile