Both are great ways to help improve your vocabulary and spelling. However I would suggest frequent reading to familiarize yourself with the words.
Answer:
I have the same kind of question.
We know it is iambic because we are able to stress every other syllable.
Just a little hint: Not all, but most poems are written in iambic. Even a lot of pop songs now-a-days are written in iambic meter ;)
I believe Shakespeare had about 150 sonnets and only a few were not written in iambic. Crazy.
Yes, Boxer Dies In The Hospital.