It is very easy to make up your own shorthand as you go along. When professors use long words, write the entire word down the first time and each time after that, use an abbreviation that you make up. The key is to write down the entire word the first time the professor uses it. If you forget what the latter abbreviations stand for, you can go back and look for the entire word. Here are a few examples. The possibilities are endless, and you will make up your own as you go along.
Est. - Established
Exp. - Explore/exploration
Sys. - System
Dyn. - Dynasty
Mon. - Mongolia
X - Christ
Xnity - Christianity
Xian - Christian
Conf. - Confucius
Arch. - Architecture
Byz. - Byzantine
M.E. - Mid East/ Middle Eastern
Theo. - theology
Euro. - European
Fr. - French/France
Soc. - Social/Society
Str. - Structure
w/ - with
w/o - without
? - question
e.g. - example
esp. - especially
cit. - citizens
ppl. - people
$ - money
≠ - does not equal
< - less than
> - greater than
% - percent/percentage
# - number
vs. - versus or against
i.e.- that is
@ - at or about
" " - quote
etc. - and so on
et al. - and others
↑ - increase
↓ - decrease
& - and
* - important
Asst. - assist/assistant