My SO and I are literally staring at each other right now, and neither of us can come up with something relatively interesting to do that does not involve the tv, or computer. Normally, I swear, we’re fun people, but tonight we’ve hit a huge, boring wall.
So far, we have the following activities:
-take a walk
-play board games
-play cards
-fly a kite
-clean the apartment
*insert cricket noises here.
So, what does everyone else do when TV/movies won’t cut it??? Any fun suggestions for us?
Um…sex?
And after that?
*I do forsee the obvious answer of more sex.
Read, either silently but in the same room, or out loud to each other.
I came in to suggest this.
Another alternative is to google “free activities {your town}”. I live in Adelaide, the arse-end of major cities in Australia and I was still able to find several pages of free or cheap activites around my home city. I’m sure your town would have similar resources.
Another suggestion is to get some cheap craft supplies - kids paint, butcher paper etc. and do some silly things like finger painting or body painting. Take photos of each other making a mess, then spend some time cleaning it up.
Hmm, I am in NYC so there is never an end to the free things to do here and I would assume there are plenty of free things to do in Montreal as well. Are there any parks or anything nearby? If you feel like you must stay inside and you can’t bring yourself to watch normal TV or movies turn on a random channel and turn off the volume and make up your own crazy dialogue for the show. Or Calvinball a board game and make up the rules as you go along.
Do you each have your own computer? If you’re inclined toward that sort of thing, I suggest World of Warcraft. Since the spouse and I started playing in late '06, we’ve saved a ton of money (by not going shopping when we get bored). Two accounts will cost you about $30/month (and I think about $20 each for the software if you don’t get the expansion), and it’s a lot of fun to level up together.
It’s geeky, but it fills a surprising amount of time in a satisfying fashion. 
There are definitely parks nearby. Usually, when we’re bored, we’ll climb up Mont Royal , but we were in the middle of doing laundry, and couldn’t leave. After that, we just became astounded at how pathetic we were at coming up with OTHER things to do while held captive by the washing machine. Which lead to a discussion on things in general to do, and eventually, a massive mind block. Which, in turn, lead us to wonder what the dopers did to kill time, aside from the dope. 
There are definitely tons of free museums, and art galleries we could go to, but we’re generally not organized enough.
I could easily spend hours in my local library reading the various periodicals.
Seconded. Before I married my husband, I made sure to get him hooked on EQ. We’ve since moved on to World of Warcraft and it is fun, cheap entertainment. We pay three months at a time so we get a little break, and as winterhawk11 says, it keeps us from going out places where we might spend more money.
Plus right now we are a two time zone marriage, so we have Friday night date nights in Azeroth. Ahhhh true geeky love.
Turn on the TV and go to bed?
Crafts? My first husband and I spent several months of spare time building a large dollhouse, from a kit. The kit cost about $100, and we spent $20 or $30 on mini-wallpaper and floor coverings. It was fun.
Go to the thrift store and get some puzzles.
My husband and I play a lot of card games and word games, at least we used to. One of our favorties ones was Hangman, then for a twist, we started making stories out of the puzzles (Yeah, we’re geeks) How about doing some volunteer work, or having a picnic? Also, check out this site: http://www.insteadoftv.com/
Cook? Make stuff you can chuck in the freezer for ready-to-eat meals, or bake fun stuff like cookies and cakes.
Cook something together - you can always search the internet for a recipe with cheap ingredients. Even if you don’t ordinarily like cooking, selecting something that sounds mouthwatering and making it together can be fun.
Find an organization to volunteer at together. (Oops, I just saw that **janis_and_cO **beat me to it, but it is worth seconding).
Light some candles, grab a bottle of wine/whiskey, get comfy on the couch or in bed and have a serious conversation about something important: where do you see yourselves in 20 years? Gonna have kids? Is there life after death?
Exercise together.
Count your blessings that you have time on your hands, either together or separately. Whew, what I wouldn’t give for more of that.
start gardening. Begin with something small but easy. Herbs work best. After a little while, move to flowers.
I came in to say cook too. And also to say count yourself lucky that you have time together to get bored. I’m in the middle of my third 14-hour day in a row and haven’t seen my SO awake since Sunday night.
Another one saying reading - libraries are full of hours of free entertainment.
What about kinky sex?
Have you tried that? nudge nudge wink wink?
What’s it like?