I save all the code I write to reuse or use as a reference later. I
just save the module in a "bas" directory. Now I've written a couple
of sets of code in "ThisWorkbook". If I try to save the new code under
that file name, it will overwrite the old code. The easiest fix I can
think of is to copy the "ThisWorkbook" code to a module, put in a
remark that it needs to be in "ThisWorkbook" to run (event triggered)
and save the module under some appropriate name.

Is this how others do it? Is there a better way?