bm is a shell bookmark script adapted from a page on jeroen janssens' website.
I thought it might work well to add a different pattern to the commands and worked them around a little.
$ cd /some/very/deep/often-used/directory
# uses basename of ${PWD} as a default
$ bm
directory -> /some/very/deep/often-used/directory
# otherwise, uses whatever first word you provide
$ bm deep
deep -> /some/very/deep/often-used/directory
$ bml deep -> /some/very/deep/often-used/directory directory -> /some/very/deep/often-used/directory
$ bmr directory
removed '${BMPATH}/.bm/directory'
bmc deep