I would start and see if you can trim your current budget at home. Make a spreadsheet and see what all your current expenses are then take it from there. Do this for each month and then you can see where you can adjust.
Things to possibly look at where you can adjust to save:
Can you get cheaper car/home insurance.
If you have cable tv, what type of package do you have and can you down grade.
Do you eat out a lot (lunch and/or dinner). Maybe cook more meals at home and take lunch.
How much do you spend on groceries and toiletries per week. Can you reduce this by buying cheaper brands. Some of them are just as good.

Do you both drive to work? Can you commute with someone or take public transportation? This will save on gas and maintenance for your vehicle. DW and I do this and this helps tremendously.
Do you buy a cup of coffee everyday before going to work, say like from Starbucks? Take coffee from home instead. This one alone might save you the $150.
How long of a shower does each person take each day? Can you reduce this down by a few minutes. This will reduce your water bill.
I used to be a grocery store manager, and one of the biggest ways I see people save is by using coupons. Sometimes they're a hassle, but if you can get this down to a science (like I've seen some people do), they can really save you money. Example: I've seen people with a $250 grocery bill before coupons. After coupons, they went down to $185. That's a $65 savings right there.
Just a few thoughts. Hope this helps.