Hi M., we live in 900 sq ft with 3 kids. We just recently gave up our dog because it was getting too crowded with the dog running around...
I'm one of those people that hates being disorganized.
I like to know where everything is.
I have bins/baskets for all the toys, they each have their own space and kids are tought from the start to put them where they found them.
All their clothes are organized in a dresser, they each have their drawers for clothes separated by warm/ cold weather and then socks, underwear and pajamas.
All the clothes that are too big - hand me downs etc for future use are in bins, labeled by size. I bought some plastic bins at Walmart for $2.00 last week.
There are shoe racks by the front door closet, where all the shoes are organized by kid, mom, dad....
I have a small filing cabinet for hanging folders, where I keep all my paperwork - I have the folders alphabetized and all items have their separate folder - like insurance, cars, banks etc.
I throw away old bills and bank statements right after they are paid. Bank statements go right away - some I don't receive - just access online.
Go to http://www.catalogchoice.org/ and enter all the junk magazines you get in the mail to stop them from coming.
I have all my photos organized in albums and the digital ones stored and organized online at shutterfly.com
As far as cleaning goes, I try to keep up with it daily.
Kids know to put their dirty clothes in the loundry basket right away after they change into their pajamas at night. I do a load almost daily. Toys, art supplies etc, get cleaned out by the kids either after they are done plaing with them or at night before we go to sleep.
I sweep the floors (we have hardwood floors) every couple of days and wash the floors once a week or so.
Put the dirty dishes in the dishwasher right away after we're done with them. If can't get to it right after dinner, then for sure before bed time.
Clean out closets/storage areas a couple times a year and get rid of stuff you don't need. I started selling all my "junk" on Ebay recently. It's great, I can get rid of stuff and make a couple of buck doing it too.
I'm not sure what else to mention. I'm sure you'll get some great advice from other moms.
Have a great day and good luck
YVette