Toiletries - clean out your bathroom cupboards and drawers and either throw away, donate or give away any beauty products and toiletries you don’t use. You could even make gift packs out of some of them. If you receive gifts of body washes and moisturisers, use these up before you buy more of the brand you would normally use. Only store things that you need to use in the bathroom, e.g. toiletries, soap, toothbrushes, toilet paper, towels, face washers, hair styling products/appliances, brushes & makeup plus a chux or paper towels for soaking up water spills/wiping down benches.
Makeup - divide your makeup into lipsticks/glosses, eye makeup, foundation, etc. and store them in small baskets in one of the drawers.
Beauty regime - keep it simple, e.g. cleanse your face in the shower in the morning and moisturize when you get out, then remove your makeup at night with cleanser and/or makeup removal wipes.
Vanity storage - if your vanity has one big cupboard with no shelf then get some drawers that will fit inside as they are much more useful for storing toiletries, etc.
Toy storage - if you have kids get some kind of toy storage for the bath toys and throw away the ones that are getting mouldy. There are lots of toy nets and corner units available in baby shops.
Towel racks - use towel racks that are attached to the wall or hang on the back of doors, rather than freestanding ones to give you more space.
Shelving - if you don’t have much storage fix a shelf to the wall for storing things like towels and bath accessories.
Toilet rolls - store your spare rolls of toilet paper in the toilet if it’s not part of your bathroom. There are plenty of toilet roll holder storage ideas from fancy ceramic ones to the simple timber rod on a base to ones that can hang off the side of your cistern.
Organisation Products & Suppliers
Baskets for storage in drawers (different sizes) - Bunnings
Drawers to fit inside vanity cupboards - Bunnings & Howards Storage