Frugal things I still do (that require little effort/time!):
-I grocery shop almost exclusively at Aldi because I can trust they have the lowest prices in town without having to do any research.
-I buy almost all of my clothes second hand, recently more online at swap.com)
-I say YES PLEASE to any and all hand-me-downs for my kids. Just this week I was given a fabulous dollhouse that a colleague's granddaughter outgrew.
-When my kids outgrow things, I give away what I can to friends/family (what goes around comes around!) and then sell what I can of the remainder at consignment shops or online. What I can't pass to my crew or sell, I donate. At this time in my life yard sales take too much time to be worthwhile.
-I stock up on things like groceries and diapers when I find a great deal (though I need to get in the habit of doing more of this again since I've got more storage space again now!)
-When I can (which hasn't been a lot in the last 2 years) I do batch cooking and freeze prepared food for quick meals later. This saves time of course but also money- quick meals from the store or takeout are usually pricey! Today I did a double batch of baked oatmeal (muffin size servings) and froze most of them) for quick breakfasts this week.