This is a really simple tip, but it was handy for me, and it could be helpful for someone else, too.
While playing around with Nitrogen, which is a great project by the way (more in a later blog post, I guarantee it), I noticed that I had to restart the server to re-load modules as I changed them (or I could manually, reload them, I know, I know..).
Since I was using Mochiweb as my backend, and I'm used to the development version of Mochiweb auto-reloading modules as you recompile, I wanted the same functionality here.
Turns out it's as simple as changing the default start.sh from
#!/bin/sh
cd `dirname $0`
echo Starting Nitrogen.
erl \
-name nitrogen@localhost \
-pa ./ebin -pa ./include \
-s make all \
-eval "application:start(appname)"
to this
#!/bin/sh
cd `dirname $0`
echo Starting Nitrogen.
erl \
-name nitrogen@localhost \
-pa ./ebin -pa ./include \
-s make all \
-s reloader \
-eval "application:start(appname)"
... and bam, modules now reload as you recompile them.