A fun way to add some character to your bathroom is by installing a wooden accent wall, like in this tutorial from Bless'er Heart. Whether it's stained or painted wood, an accent wall can add texture and visual interest to the room. A wood plank wall is also a good option for awkward sections of walls in a bathroom, like above a garden or jacuzzi tub.
You can never go wrong with a new coat of paint, shown in this bathroom makeover from At Home with the Barkers. It's amazing how much paint can change the look and feel of a room. And what's great about paint is that it's inexpensive and can be completed in less than a day.
Don't have the cash to buy a new vanity? Give new life to your current vanity with paint or stain, like this tutorial from Bless'er House. You also can update the look with new hardware. Don't be afraid to go bold with your color choice.
Instead of spending money on a new mirror, give your existing mirror a little makeover by adding some trim. This project is inexpensive, easy, and can be done in an afternoon. It also helps that there are tons of tutorials online to show you how to do update your bathroom mirror, like this tutorial from Pretty Handy Girl.
A new lighting fixture can give a bathroom a completely different look, like in this tutorial from Brandi Sawyer. And updating a bathroom lighting fixture is easier than you think. It's also budget-friendly, as most bathroom lighting fixtures cost around $100. If you aren't familiar with electrical work, watch some online video tutorials so you're informed and feel confident tackling the job yourself.