How do I bind a macro to a key?

[Dan Anderson <dan@mathjunkies.com>]

Is it possible to create a macro and bind it to a key (or set of keys)
for the rest of the session?  Sometimes when programming I'll find I
need like 5 separate macros, and I don't know how to C-x e each one
separately except for creating one, running down the code and running
it, and creating another.  This seems very inefficient.  Is there a
better way?

Thanks in advance,

Dan