Could you consolidate your car and home loans? Might save you a little. Also shop around for the best rates on those loans and switch (only if it isn't going to cost you the earth in exit fees of course).
It's hard isn't it? We are working on cutting our expenses down too. We are saving quite a bit on groceries with having our own veggie garden. Also I've been making an effort to shop around and buy in bulk where I can. I don't buy the kids clothes as I request they get them for birthdays and Christmas and we are lucky enough to get hand me downs for DS as well.
I'm sure you know this but if your DH travels for work and needs high speed internet for work then that is a tax deduction. Or get him to request a fuel card if he hasn't got one.

Best of luck