via Jennell Stewart of NaturallyCurly 

One of the most common complaints by women with hair type 4a, 4b and
4c coils is frizz. I mean, dang, we have to accept that our hair is
coarse, gets really dry, has almost no natural curl definition, and to
top it off, we have to deal with frizz when we try to create that curl
definition? Ugh.
Because my hair type (4b) has little to no curl definition, like most naturals, I style my hair in twists and/or braids
and then loosen them to create a curly look, better known as a twist
out or braid out. Frizz is always ready to hijack a style, so we have to
learn to be creative when preparing our hair. It can take 40 to 60
minutes to properly prepare my hair for a curly style, only to wake up
the next morning with a head full of frizz!

Guess what? There are things that can be done to help keep frizz at
bay, but none of these are completely guaranteed to work. Try them all
to see what gives you the best results. Something is bound to work
because I am proof that is possible to get great curl definition with
low frizz. I’ll say it again, it IS possible!

Evaluate Your Technique

Twisting is very simple, but not all techniques are effective in
giving good, smooth definition. When you twist your hair, you start off
with two sections. You twist these two sections around each other
repeatedly, until you get to the ends.

I suggest, keeping your two sections of hair completely separate all
the way to the very end. It’s very tempting to “borrow” some hair from
the longer piece and add it to the shorter piece when you get to the
bottom, but keeping the sections completely separated ensures that the
hairs aren’t weaving together. This results in clean and smooth
separations when it is time to separate the twists, thus low
manipulation and low frizz.

Is it Time For a New Product?

Not all styling products are created equally. What may be a great moisturizer may do a poor job at giving good hold. If you want good curl definition for your twist outs you need a styling product with hold.  This means you may have to get a brand new product or reach in the back of your cabinet and pull out that product that made your hair hard the
first time you used it and deemed it unfit for your hair.

Products that give your hair hold tend to make it feel hard, but if you moisturize properly before applying this product, your hair will feel softer then using the
product alone. Products with hold freeze the hair into place and helps
to hold your curl definition in place. The stronger the hold, the less
the frizz.

Wet Styling vs. Dry Styling

In addition to figuring out which products help fight frizz, try
styling your hair on soaking wet hair, damp hair and dry hair. For
textured like mine, styling my hair wet gives me the best curl
definition, at a price though: good curl definition also means lots of
shrinkage.

On the other hand, when I style my hair when it’s dry, I get
elongated curls that are looseer. Testing this out could help you
discover many things about your hair, most importantly your frizz
levels.

Time for a Trim

If you’ve tried everything and your ends seem to be the main area
where you have frizz, it may be time to trim. I know we don’t like the
sound of that, and it seems counter productive if you have goals of
growing your hair to BSL, but rough, dry, brittle, split ends will harm
you more in the long run if you don’t end the relationship with them
now. Any efforts you make in achieving perfect curl definition for that
banging twist out will be done in vain.

In the end, you can get a great twist out with little frizz. You just
have to keep at it. Practice makes perfect, curlies. Practice makes
perfect.

How do you do your twist-outs?