Get a basket or plastic bin for under the sink.
Organize your hba items
Don't have all your shyt out on the counter.
Use a separate one for bathroom cleaning supplies
Get a toilet paper holder (cylindrical, holds 3 or 4 rolls)
Get the matching toilet brush holder so that isn't visible to everyone either.
A nice wastebasket.
Towels, one nice set to have on your towel rack at all times.
Basket with rolled towels.
Pillar candles on very nice bases.
If your counter is big enough do a basket of different coordinating orbs.
Don't get the cheap standard 8.97 bathroom rug set.
Get a beautiful shower curtain and don't get the basic plastic 2.97 hooks.
If you have wall space get a nice framed pic that either coordinates w the decor you've already chosen or decorate by pulling out colors that are inspired by the pic.
Have fun. I love decorating. Bathrooms give you so much bang for your buck.