It sounds like maybe you and DH need to have a bigger talk than just about cutting back on spending. Like how you view your finances over all, and what your shared goals should be. Do you have a yearly budget? This really forces couples to make choices about what's important to them. If your hubby values his little purchases that add up, what might he be willing to give up in another area? That type of thing.
If you are at all religious, crown.org has great tips for financial stewardship. If not, there are a lot of software programs for budgeting out there. We use Quicken and it works great. Every January we set the budget for the year, and every month we compare our actual to our budgeted spending. If we've gone overboard in one area, we cut back the next month. This also prevents the "there's plenty in the account" syndrome by holding back a set amount each month to pay for once or twice a year expenses like insurance.
I've found it really helps me to do the math on my little weekly throw away expenses and see what they are costing me a year. A $20 manicure doesn't seem like too big a luxury, until I think about getting one every other week. Then I have to decide if that's really where I want to spend that $500 this year. The other thing that helps is to have a mental list of my wish list items and what they cost. Then when I am considering purchasing something, I can say would I rather have this OR the other that costs the same, b/c I can't have both.
Of course, if your hubby doesn't agree with you about the importance of budgeting, etc, then it will be hard to get him on board. And back to my first sentence.
Good luck!