Ben Simon has a couple of nice posts on eshell. In the first, he talks about finally wrapping his head around eshell and shows some of the things you can do with it that you can’t do or that are harder to do with a normal shell.
In the second post, he writes a bit of Elisp that switches to an eshell buffer but makes sure that it is in the same directory as the default directory of the buffer he’s coming from. That avoids having to manually switch to the correct buffer with cd some-buffer from within eshell.
Both posts are short so pop on over and take a look when you have a minute or two.