How to really live in Belfast on a budget

So, we've done it.  We met not quite two years ago at a dinner party, and now, in a whirlwind we've been married (twice!) honeymooned, travelled across the world, and have finally returned to beautiful belfast- and we're broke ;)  But we're not going to let that get us down, we're channelling our inner 'extreme couponer', harking back to money saving strategies of our student days and are committed to finding out how to live in this great city as cheaply as possible.  We'll document our discoveries here, so check back regularly, and in the meantime if you've any tips already discovered please feel free to comment and share them!