Okay, I'm trying to get things organized around here. First off, I did a purge and got rid of everything we have not used in a year, all paperwork more than 4 years old, and anything we didn't want/need. I threw some, donated some, ect.
Now, my issue is finding storage space for what we do need/want. We live in a very small house, 800 sq feet, 2 bedrooms. There are 4, soon to be 5 people in here. My husband loves everything to be super organized and neat. I was raised to let the housework go and worry about other stuff... that isn't working in this space. We have a 2-1/2 year old, 10 month old, and I'm due in June with #3.

All 3 kids are going to be sharing one room which is only about 12x10', our room is about 13'x13', we have a small kitchen, one tiny bath, tiny hall/linen closet, combo entry/dining room, and living room which we designated one corner for a play area (like it stays in that corner.

) We have an unfinished basement where the laundry is and a small room off that which is our home office. We run two businesses from home.. I do Medical transcription (that'll be ending soon and not resuming until the youngest is a bit older), and my husband owns a construction company. I do most of his secretary work as well as run the home finances.
Anyway, I need help... desperately. I forget things so much. Forget to pay a bill, mail this or that, pick up something at the store, can't find things when I need them. Everything is just really scattered and I'm basically starting from scratch here.
What storage ideas can you give me? What containers, ect should I be looking for? I got some underbed containers for the kids' blankets and extra sheets so that freed up a drawer in their dresser. Also bought a hanging shelf set for their closet for shoes and some clothing items. A shelf in the hallway closet is totally designated to diapers and wipes because I buy those all in bulk.
Shelving is an issue because half of the house has concrete/plaster walls and I cannot really put anything up on them.
I'm so overwhelmed... help.
TIA!