How to organize and decorate a very small apartment?

Here are tips for the bathroom https://familyfocusblog.com/some-effective-and-easy-tips-to-organize-your-bathroom/

A few ideas in general -- hang clear shoe bags (from big box store) on doors (pantry, closet, bathroom, etc.) to store about anything. I have one hanging on the inside of the utility room door where I store my sewing thread in plastic bags in the shoe compartments. This room is next to my DR-office-sewing room . Go up where you can. I have a 6' bookcase in my main closet and it stores sheets, sweaters, pjs and miscellaneous. Double-rod where possible and allowed. Use pant hangers with multiple arms and hangers that hook through another one to gain space. Put up shelves if allowed. Use pegboard or racks and rails (check IKEA) in the kitchen for pots and pans or above your desk for office supplies, mail, etc. Use space below your bed . You can buy containers with wheels that fit under there or use large flat boxes (good for extra shoes). In lower kitchen cabinets, use plastic crates (bottoms only) that fit your shelves for pots, pans, plastic storage containers, even groceries. Need a pantry? Try a 6' bookcase with its 5 shelves. For bills, use a loose-leaf notebook, set up a list (or spreadsheet) of regular bills and write in those "extra" ones. Set up a Master List and make a copy for each month. As new bills come in, just drop them in the notebook until next bill-paying time. File paid bills in an accordion-type folder and file what should be retained with your income tax return. At the end of the month, file page to back of book. I use all of these suggestions and they work really well. Hope this helps.

I would go through decor magazines, books and internet sites and tear out photos of rooms that you like and see what the common elements are...use this as your decorating theme and then incorporate furniture and accessories you have. Then make a list of items you need to buy to complete the look. Make sure you like the look...decorating is about loving your space and making it functional..not just making it look good.

hometalk has some great ideas!

https://www.hometalk.com/search/posts?filter=small%20space%20decor

Instead of conventional furniture, switch to pieces that are multi-functional, and those that make more efficient use of vertical space. Some examples are shown in the pictures below.

Installing above-the-door shelves are an easy way to make use of space that is often wasted.