This is a great method of freestyle rapping.

Step 1: Clear Your Head

As mentioned in my first instructable:
https://www.instructables.com/id/How-To-Rap/

Rapping and Freestyling are two different things
Freestyling is on the the spot, requiring quick thinking.
Although you need an active mind,
you must not over-think what you are going to say.
That's why you must clear your mind and focus
on a single thought.
Then let your thoughts flow from there.

Step 2: Follow Up

Most freestyling takes place in battles between friends.
If this is so, (just like martial arts), you should gather information from your opponent(s).
Take a good look at them. Point out weak points in their fashion sense, how they look at the moment, and if you know them well enough what they have done in the past. (Example:An embarrassing but funny story.) Make sure the person can take a joke and laugh it off. (To prevent a fight)
Then start freestylin'!!!

Step 3: In the Moment

As you freestyle, you want to keep the ideas flowing.
(Unless your making a freestyle song) Keep it short.
There's nothing that ruins a freestyle faster than dragging out what your trying to say.
Also remember to keep your rhyming sounds in four sentence phrases or lower.
Try to limit yourself to four rhyming sentences unless there are many rhyming words
that rhyme with the sentence before.
Limiting will prevent hitting a blank in the middle of a thought.
This part is VERY important.
Try to keep you sentences close to equal length.
It's okay to go a little over but don't over do it.
You may also change the sentence length when you complete a phrase.
But the most important rule is, HAVE FUN!

That's about all, you should win just about any freestyle rap battle you come across.
You may take a look at the last page for extra tips

GOOD LUCK!!!

Step 4: Tips and Tricks

Sometimes freestylers like to split syllables to help fill in pieces of the sentence
(Example: Individual = In-di-vi-dual)

Another good tip is to keep the thoughts simple,
but really when your in the moment it seems like you don't think at all

I will update this if i find more tricks
but for now THAT'S ALL FOLKS!!!