One of the first things recommended is to begin wearing a hat. The hat can be worn over the hair and can be something like those worn by the Rat Pack or it can be soft and made out of cloth. My problem is trying to find one that fits over my hair when it is pinned up since my hair is down to my rear. I've got a couple that meet that criteria. In addition, one can wear a baseball cap which allows you to wear a ponytail under the cap. If you want something snazzier, use a fedora or even one of those hats rated to protect you from the UV rays.
If you aren't into hats, look at wearing a turban instead. Make it out of material that matches your mood or your outfit. In addition, turbans range in style from those of the 1940's and 1950's, to ethnic, to unique. If you do a search for turban tutorials on Youtube, you'll find dozens of videos showing you how to do it. Be sure to use turban tutorials for women to the search parameters otherwise you'll get a lot on tying mens turbans. Most turbans use either a head scarf or a long strip of fabric.
Speaking of head scarfs, there are other ways to use them to cover your hair. Some ways of tying the head scarf will cover your head while others are used in a head band effect. Hair scarves come in two main styles, square or rectangular. One of the easiest ways to use a head scarf is to style your hair and wrap the scarf around your head and tie it at the nape of your neck. This way it keeps your hair out of your face. Another way is to take a square hair scarf and fold it in two so you have a triangle. Place it so you tie it at the nape of the neck and the material covers your hair. If you want you can tie the tip of the triangle into the knot at the nape to hold it down.
The other choice is to tie the ends together at the top of your head so a bit of hair is showing but the rest of it is covered, almost like a turban. To create a slightly different look, instead of tying the triangular scarf under your hair at the base of your neck, tie it on top of your hair so it looks more like a cap. These styles are meant to be worn all day.
On the other hand, if you want something that can be taken off and put on again easily, you'll need larger square scarves, you can again fold one in half and place it over your hair, tying it under your neck so it can easily be removed when you get where you are. Another choice, one popular with Grace Kelly, is to fold the square scarf in half to form a triangle, place it on your head but instead of tying it under your chin, you'll wrap the ends around your neck before tying.
Hats, turbans, and scarves, oh my! Between Youtube, and websites on the internet, you'll find a lot of different ways to construct turbans and tie scarves so you'll never get bored. Let me know what you think, I'd love to hear. Have a great day!