all you gotta do is practice as much as you can....freestyle in your head as often as you can.....when your in class......freee in ur head....when ur at church....free in ur head....free about the pastor....free about EVERYTHING, EVERYWHERE...WHEN YOU GET TIME, ALWAYS FREE OUT LOUD, ITS BETTER THAN IN YOUR HEAD....THE IN YOUR HEAD TIMES ARE FOR WHEN U CANT BLURT THE RHYMES OUT LOL...thats the only way ive seen good freestylers get produced.....but dont worry...all these cats u see wit perfect multis and punches in their ''freestyles'' aint really freestyling....like crooked i, old eminem, lil wayne, all them....not really freestyles, all written. look at the real hip-hop heads for real frees.
*ALSO.....WRITE ALOT.....IT HELPS YOU WITH RHYMES YOU CAN USE IN UR FREES*