I’d like to point out an excellent resource for couponing and saving money on groceries/toiletries: Money Saving Mom. This website also has tips on working from home.
Remember, if cash is tight there are two ways to help. Either increase the cash inflow (new job, second job) or decrease the cash outflow (or do both). Often, decreasing the cash outflow is a more successful endeavor for the stay-at-home mom who has limited time to devote to work-at-home opportunites.