Have you read The Tightwad Gazette by Amy Dacyczyn? While the prices are dated, she had a very large family (6 kids) and was the queen of frugal living.
If you focus primarily on numbers and budgets, you'll probably fall back into your old habits eventually. Change your mindset and try to embrace a simple living lifestyle - environmentally, financially, spiritually. Think of this as an opportunity to teach your kids about money, gratitude, hard work, sacrifice, and self-sufficiency.
I have a few suggestions and questions. How old are your kids? How many years do you have left on your mortgage and how much equity do you have? Is your husband on board with your plan?
Groceries $996.45
Do you have a Costco nearby? Aldi? Are you doing all of your shopping at one store? How many shopping trips do you make each month? Start substituting a couple of vegetarian meals each week - lentils, rice, breakfast for dinner, leftovers, etc. Even if you only get your bill down to $850, that will make a big difference (especially if that includes school lunches and a packed lunch for hubby). Try a cash-only system and learn to make-do with what's in the pantry after you run out each week. Get creative, shop around, and clip a few coupons and you can get this bill way down.
Gas $613.79
As others have mentioned, combine trips. Can your husband car pool? Do your kids ride the school bus or do you drive them every day? You have a large family, so not many options to get a more fuel-efficent vehicle. Read MMM's blog post on expert driving. Fill up on gas when the prices are down, even if you're not low on gas. Try cutting this down to $550/month at first.
Out to eat $209.42
Pack lunches, pack lunches, pack lunches. I only have 2 kids, but I refuse to pay $4.50 a day for crappy school lunches. Challenge yourself to only eat out 6 times in the next year, to celebrate each family member's birthday. Use groupons, coupons, take advantage of 'kids eat free' deals. Get this down to $60/month
Entertainment $214.90 (Netflix, HuluPlus, WOW accounts, a book subscription, no cable)
This seems awfully high. What are WOW accounts? Does this include internet? Go to your library when you're in town. Swap books with friends. Ask the grandparents to buy video games, books, music as birthday gifts instead of toys. Try getting this down to $30 max.
Utilities $464.30
It's easy to see these as fixed prices, but watch your usage. Do you have compact flourescent bulbs and smart power strips? Do you turn off lights during the day and when you leave the room? This forum has inspired me tremendously to get our utility bills down. We're about to re-insulate our old house, which I would imagine in North Dakota would make a huge difference in the winter. Are you cell phones/home phone service included here?
Mortgage $1700
4% isn't bad, but could be better if you refinance now. Does this include taxes and insurance?
Insurance was due $450.00
Automatically set aside $75 each month so it doesn't sneak up on you. I assume this is 6 months worth of auto insurance? Do you still have comprehensive coverage on the Camry? If you've been with the same company for a few years, shop around and you'll probably be able to lower your rates.
Medical $1185.12
Is this insurance, doctor bills, prescriptions? Is this a typical monthly bill? Does your husband's job offer a pre-tax flexible spending account for medical bills?
Clothes $466.55 (winter coats for kids)
I've bought really nice used coats on ebay for $10-$15. I just bought barely-used snow boots for $15 at a yard sale last weekend. They would have cost $60 new and both of my kids will wear them. We live for hand-me downs.
Pet food $60
We pay $25 for 40 pounds of dog food at Costco. It's painful how much more we used to pay for this at Target and the grocery store.
Car Maintenance $35.51
Home repairs $65.92
Misc $494.94 (target trips, amazon.com, school pictures)
I avoid Target at all costs. It's hard to get out of there without spending at least $80. Try to take out $100 or $150 cash for all household shopping on payday and don't spend a penny more.
If I were you, I'd try to live on your husband's salary alone and use all of your tips to pay off the furniture and student loans. Maybe others can advise you on what to do with the $13,000 stocks.
Good luck!