I often ssh into my machine, and then run 'screen -r' to connect to my (usually) running screen instance and pick up where i left off.
However, i feel it's tedious and could be automated.
My question is, where (like, .bashrc or wherever else) could I put a script to first check for a running screen instance; then if one exists, connect to it.
I'm ok with building the script, I just don't know where to put it.

My guess would be to call it from .bashrc, if you want it to run every time you login...as when you su - to that user from a running session.

An alternative I use is to write the script with a name I can invoke with a couple of keystrokes by invoking the history.
For example: I have a script that scans my spamtraps named ckspam.sh. After login, I type !ck to invoke the script. Most of the time, it's also the last command I've used on a session, so up-arrow, enter will also re-execute. The latter probably wouldn't apply in your case, but if you had a unique-enough script name (sz.sh) you could invoke it with !sz anytime you wanted.

Poo! This is a duplicate thread. Posted my response to the other thread. Reported.