To me good vocab is when u use really unusal words, and like CALI said a lot
of people seem to think that good vocab is a use of big words I dont think
thats the case, It just kills your flow.

Use unusal words in place of something perdictable, try using a Thesaurus
to build up your vocab, but just make sure u use the right words a the right
time I have seen lads of people attempt to do this but use the wrong word.

Hope this helps stay up Ment

1~