Yes, I'm alone caring for a crazy dog, and remember the 8months old stage in the middle of winter when we couldn't run it off. There were times that I even crated her when I was home to get some housework done! She's 13 months now, and I make sure to really tire her out with a good run or bikeride when I have to have her sit quietly (like now) while I use the computer for example. I did the tethering thing too, and I also tied her leash around my waist while I did housework. I think she's learned a LOT of patience by my doing this, I even mowed the grass with her tied around my waist too!!
I have a nine year old son that WILL take her outside and play with her, but he gets bored after 10 minutes, and that's not enough for my dog, so I have changed things up and had my son do more housework instead!! I've also packed away a lot of "stuff" that I find that I don't really miss. If It's not out, I don't have to dust it or clean it, or worry that the dog will knock it over. I'm also teaching her to ring a bell when she wants to go outside, so that there's no accidents in the house. (I've also considered getting a playmate for her, but I take her to doggy day care for that kind of fun instead, twice a week)
Sometimes I feel like I'm not a good enough owner on my own, for my girl, but she's happy, and getting better behaved all the time! (Sometimes, if I'm being totally honest, I wish I never got a dog...but then she looks at me in the middle of a huge mess, and I just melt, and clean up after her...)
I can only look forward to the long years we will spend together when she's older, and less crazy, and won't give those up for anything! (I'll even put up with a ton more shredded toilet paper rolls!!)