For the hair you must do that squinty thing again so that you can see the shadows and follow my Jane's Perspective rule of using at least 3 colors to paint something. You need the color of the object, the shadow color and the highlight color. Mix these colors and test them on the baggie that contains you photograph. When you get a good match for the hair you can paint the shadows in with a medium size brush. Once you have the shadows in place (just blocked in basically) then you can paint in the rest of hair in its' natural color. With enough paint on your portrait's hair you can then pick up a round or liner brush to actually paint each little hair. It's sort of like brushing the subjects hair with this little brush. Without picking up any paint on this brush, you should be able to stroke through the shadow colors and hair colors to make the individual hairs. You run the paint strokes in the exact direction of the hair. Now, I admit that's going to take a while with one little pointy brush, so what I do to speed up the process (and keep my sanity) is to use my fan brush to "brush" the hair. I have various sizes of fan brushes so I can get into the small areas OR here's a good and economical idea - whenever anyone tells you that they "used to paint" but they don't paint anymore and want to know if you want their old paint brushes - grab them. Some of them will be in excellent shape and some will honestly be kinda scraggly. It's the little scraggly ones that you'll find useful here. Those scraggly bristles will create wonderful fine "hair lines". So, Jane's Perspective says that no brush is really a "throw-away". Even if you just use them to clean between the grout cracks in the bathtub - I've found a use for almost every old paint brush I've come upon. 
Once you get all the hair strokes in place, you can add the highlights the same way. Squint you eyes so that you won't do too many - just the ones in the photo. Highlights are like accessories. Too many and it's not a highlight anymore, it becomes more of a "what's all that white stuff in their hair?" (Dont you just hate it when someone can't see your artistic vision?)Once you get these beautiful hair strokes in place you can start on the details of the clothing. Remember to use three colors, the color of the cloth, the shadow color and the highlight color. In my example I had the misforture (or challenge) of creating plaid!!! What I found useful was to paint the background fabric color (in this case, white), then shade the white. I did this on both the hat and on the dress. Then I took a good look at the direction and colors of the plaid, used a dry brush of red and blue and crisscrossed the colors. The hat was rather simple to duplicate. . .
as was the bow, since it was just a matter of using the color of the bow, creating the shadows and then the highlights with my mixed colors. . . BUT
the sleeve was something else. The pattern of the plaid actually had to run with the folds. Careful observation was the biggest help. If you have stripes or a checkerboard pattern to paint you can easily see what I mean. Watch carefully how each line "jumps" as it goes over a fold or how each box of the checkerboard pattern, shifts. Then you may need to add a little more shadow. I can recommend a glazing technique here. Once the picture is dry, use a little liquin with your paint which will create a transparency. Painting a transparent shadow over the patterned area will create a delightful subtleness. The liquin will also help the oil to dry faster so that you can add more layers of shadow if needed. If you have no liquin you can thin your shadow color with mineral spirits but make sure the paint is good and dry or you will thin out and smear the whole thing.
There, now we have the whole portrait completed. I'm sure there's probably something I've left out or a question you have about your particular portrait so I'm available at LivePerson.com if you need some personal help. I'm also tempted to delve into the world of videos and would love to make a video of the whole process - I'm no movie star orVanna White-type person but if you're concentrating on what my hands do and not my whole persona, I might just have a video that you can use. Stay tuned and I'll be sure to let you know when and where that might just become available. And thanks for reading my blog. I hope you're excited about painting your first portrait. Next, let's see, how about a landscape or one of my "off the wall" music "portraits". Hmmmmmmm.
The completed portrait on the easel.
as was the bow, since it was just a matter of using the color of the bow, creating the shadows and then the highlights with my mixed colors. . . BUT
the sleeve was something else. The pattern of the plaid actually had to run with the folds. Careful observation was the biggest help. If you have stripes or a checkerboard pattern to paint you can easily see what I mean. Watch carefully how each line "jumps" as it goes over a fold or how each box of the checkerboard pattern, shifts. Then you may need to add a little more shadow. I can recommend a glazing technique here. Once the picture is dry, use a little liquin with your paint which will create a transparency. Painting a transparent shadow over the patterned area will create a delightful subtleness. The liquin will also help the oil to dry faster so that you can add more layers of shadow if needed. If you have no liquin you can thin your shadow color with mineral spirits but make sure the paint is good and dry or you will thin out and smear the whole thing. 
There, now we have the whole portrait completed. I'm sure there's probably something I've left out or a question you have about your particular portrait so I'm available at LivePerson.com if you need some personal help. I'm also tempted to delve into the world of videos and would love to make a video of the whole process - I'm no movie star orVanna White-type person but if you're concentrating on what my hands do and not my whole persona, I might just have a video that you can use. Stay tuned and I'll be sure to let you know when and where that might just become available. And thanks for reading my blog. I hope you're excited about painting your first portrait. Next, let's see, how about a landscape or one of my "off the wall" music "portraits". Hmmmmmmm.
The completed portrait on the easel. 