One of the best things I did was sign up for a organic fruit-veg box to be delivered once a week. They leave it in a safe place if you're out. That meant I only had to top-up once during the week. You can get a family box if you're a raw vegan, or otherwise eat a lot more fruit/veg than everyone else ^^
Large scale batch cooking only works if you're going to freeze some of it, but you can cover two days at once. I like to make a soup, and then use the left-overs the next day as a base for a vegetable stew or similar. There's a lot of things you can do this with.
As far as cleaning goes, the easiest thing I found was building it into my routine. I'm very busy at the moment, but I get basic cleaning done by loading the laundry as soon as I get up, and then putting it away when I get home. Small loads don't take long to put away, so do it frequently! I do dishes in the evening.
For stuff like vacuuming/dusting/wiping, just do one thing for 15 minutes each day. You can get a heck of a lot done in 15 minutes. Make it an exercise to get more covered than the previous day
It's good to fit into health & safety breaks from the computer.
Or you can hire a cleaner to come once a week. They are not that expensive. In the UK my local service is £11 an hour. They can tackle the stuff like cleaning the bath or vacuuming properly.
Grooming doesn't need to take that long anyway. Five minutes in the morning to do my teeth and splash some water in my face, and then ten minutes in the evening to take a shower.