How do you manage to work from home?

Lots of times I hear people saying they want to be home with their children, but cannot afford to do so. I'm always asked how I do it, how do I save money and stay on a budget.
For me, working is not really an option, sad but true. I'd love to be able to get a job, but with the average cost of childcare for my daughter being $185 a week, it would be foolish of me to get a job only to have to pay that as well as more $$ for gas each week. We decided the smartest thing would be to stay home and work. I won't lie though, it's hard to juggle an 18 month old, meals, cleaning, playing, and work. Some days I feel like I have accomplished nothing. I try to stay on somewhat of a schedule though, so that helps.
As for our budget, I cook most meals- we only eat out maybe once a week, hubby takes his lunch to work every day- I always cook enough to have leftovers for him. I use tons of coupons- and they really do help, some people think they are a waste, but they save us lots each week. I usually spend no more than $65 a week for all groceries, tolietries, cleaning supplies, paper supplies, diapers, wipes, etc. My Murano gets about $25 in gas a week, which is mostly used on the weekend, hubby only uses about $20 a week in gas- luckily we live close to his job.
I would love to hear ideas of what others do to save money. I'm always open to new things, anything to save a buck!