We all hear you! You have just have to do less!
What time do you leave in the morning? If your kindergartener is going to bed at 7 PM, he's probably getting up early but has a relatively late school start (compared to high school). So there's probably time in the morning to have some together time.
Homework? How much does a kindergartener really get? Someone else must be helping you, right? Do you have a husband or a nanny or a sitter? Surely someone can do some of it.
On your way home from work, are you stressing about how much you have to do? Try really hard to put some calming music on, or a book on tape, and decompress! Then you'll be fresher when you get home and not frantic about what all you have to do.
A lot of cookbooks and people like Rachael Ray have done family plans where the whole family cooks a week's worth of meals on Sunday and, with rare nights of leftovers, there are plenty of things ready made that just have to be heated up. Whoever is doing your son's after school care can surely put something in the oven for you to be heated and ready when you get home. Stack the dishes in the center of the breakfast table at night, so the breakfast dishes can be cleared away and the dinner table set quickly. That's a good job for your son and his caregiver too. After dinner, teach your son to bring his plate and silverware to the sink or dishwasher, but then leave everything until after he goes to bed.
After he goes to bed, pick one activity for the evening. Once a week, read a book on child development. Another night do laundry and just fold/sort while watching TV. I'm a firm believer in kids helping to sort laundry and put it away - make a game of it (matching socks, stacking similar things together, etc.). It's also a good weekend activity or something for a rainy day. Third night, vacuum. Make better school lunches? Make several all together and freeze - sandwiches freeze very well and you can make 5 almost as quickly as you can make 1. Small packs of carrots or cheese cubes or cookies or pretzels can be put in small containers or zipper bags put in the fridge for a quick grab in the morning - or pack the lunch box the night before and put it in the fridge. Juice or water can be put in 5 reusable bottles and kept in the fridge, saving you the time and expense of buying juice bottles or boxes that have to be recycled or thrown out.
Chore charts can be bought at any teacher store or on line, or at office stores or toy stores. You can also get a write on/wipe off type that is magnetic and sticks on the refrigerator. Stickers are cheap at the dollar store. Make an activity with your child of going for one, picking out the stickers, and coming up with the jobs. That's a big part of connecting with your kid - so you get the time with him and get the job done.
Read to him while he's in the tub, or make a chore chart while sitting there watching him in the bath. Go over his spelling words or flash cards while he's in the tub - it's a great time because he can't go anywhere and has to pay attention to you! Multitask in a fun way, not a distracted way.
Finally, take it easy on yourself. Not every chore has to be done every day. Close the bedrooms doors and don't make the beds every day. Or just pull up the comforter and call it a day. Use paper plates one night a week so there's no dishwashing. Recycle heavily the other 6 days so you don't feel guilty!
Figure out the most rewarding things to do with your son, and do those in the one hour. Add in a half hour in the morning - if you are organized and the morning isn't a chaotic time, you'll enjoy it. Get up 1/2 hour earlier than your son so you can have coffee and a shower without distraction. Delegate other things to whomever else is in his life as a family member or caregiver.