Hey All,
My SO recently left his job to head back to school, which I am
completely supportive of!

not only because it's going to put him into a career his loves rather than a job he hates (and let me tell you, he HATED IT haha) but also because he supported me almost completely for 3 or so years while I finished college. The little I did contribute was like 150-200 per month on a part time job I had. I feel like I owe him the next year or so while he changes his path!
He has a good amount in savings, which we are using towards school now, so we haven't really had to rely on my income until this month. Everything is paid for so far, we have had enough for food, bills, and a few extras on my salary. My main concern is that I don't feel like I'm prepared for an emergency or anything major that might come up. I don't have a huge amount of savings as I had to pull money out for car repairs a few months back. Not only that, but I am just starting out in my career, so I didn't have a 'big girl' salary until around April, meaning I've only had a few months to REALLY start saving.
Does anyone have any advice for me? Were there any major 'shocks' when you went to one-income? Any habits you had to give up/lifestyle changes you had to make? How did you budget, plan for savings/life events, etc??
Any help would be appreciated

I know it will take awhile to build the type of savings I would feel comfortable with, but I want to feel like I'm preparing properly and doing everything I can to get us on the right track for the next year or so.
Re: Advice for transitioning to a one-income household??
The best way to get started is to put together a budget. Take your bank statement from the last month, and add up what all you spent in each category. I.E. Mortgage, gas, utilities, cell phone, food, entertainment, etc. Then plug those into a spreadsheet along with your monthly income.
This will show you whether or not you will be able to continue to live your same lifestyle while your husband is going through school. If the numbers are in the red, then you will need to sacrifice things or budget accordingly in order to make ends meet each month.
When my husband was laid off for a few months, we cut eating out, limited driving with our vehicles, meal planned more, and cancelled any monthly subscriptions like Netflix, Xbox live, Sirius radio, etc. This helped us to get by much easier than if we wouldn't have cut things.
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Start with fixed items (car payment, rent/mortgage, utilities, insurance)
Meal plan and take advantage of sales & weekly specials. Take your lunch to work. Limit (or eliminate eating out)
gas, car maintenance and license/registration
medical co-pays and deductibles
personal care (haircuts) - skip the extras
clothing - wear what you have, buy on sale or clearance or consignment for what is NEEDED
OK - still have money?
Consider saving a bill - every month! That will help you improve the e-fund.
cell phones - talk only - at the cheapest plan
internet - only if necessary
TV - use Netflix/hulu etc - in place of cable/satellite services
set aside a SMALL amount of fun money
set aside a SMALL amount of individual personal money
set aside a small amount for gifts (Christmas/birthday/weddings) so you are prepared when they occur
DO NOT LIVE on your credit cards! Learn to live on your current income --spend less than you take home. Save first for an item - then buy.
You can buy almost everything on sale or clearance. Many items you can borrow or rent.
Can your SO get a PT job while in school?