I started showering about 2-3 times a week instead of every day. This not only cuts down on shower time each day, but hair drying and styling, which for a woman, can really add up. I also now bathe in the evening so I don't feel rushed and take the time to moisturize, do all personal grooming etc, taking care of it all at these few set times. As odd as it may sound, it's one of the best decisions I've made in the last year or so.
Stay ontop of clutter by picking up for a few minutes daily and finding solutions for anything I notice I'm constantly dealing with (either a better system or get rid of it). I find that a clutter free house saves time and mental energy and makes things look clean with minimal other cleaning.
Come up with easy meals that you eat the same of on certain days of the week. For example, we have salad for dinner every Sunday, pasta every Wed, eggs every Tuesday, and usually some type of veggie burger/sandwich on Friday. This leaves only three other meals a week to come up with.
Eat oatmeal at my desk at work for breakfast each morning.
Very minimal makeup and hair styling.
Pay bills and do all financial planning once a month. I set as much up on autopay to credit cards as possible, have everything automatically tracking in mint, and then once a month I login, look over all cc charges, pay cc bills, mortgage, and any other random bills that have collected through the month. I'll also look over investments, budgets, etc and reassess if anything needs attention.
Purchase everything either at the grocery store trip once a week or online. Try very hard to otherwise stay out of stores (other than goodwill or Ikea or others a handful of times a year where we have to get something we absolutely have to try on or see in person). Shopping sucks a ton of time and we wind up buying stupid crap.
Make most household and beauty products from a few of the same ingredients (vinegar, baking soda, bees wax, etc) so we can stockup on these at the grocery store and don't have to think about running out of specific products.
Try to really evaluate everything I do to determine (a) do I really value doing it and/or (b) is there a more efficient way to do it? I try to not do things out of guilt or obligation unless I find them genuinely useful.