Reddit mentions of The Poem's Heartbeat: A Manual of Prosody (Copper Canyon Classics)

A book you may want to look into is The Poems Heartbeat by Alfred Corn. It is a very good introduction to prosody.

http://www.amazon.com/Poems-Heartbeat-Manual-Prosody-Classics/dp/1556592817/ref=sr_1_1?ie=UTF8&qid=1418917438&sr=8-1&keywords=heartbeat+of+a+poem

Poetry Foundation has a good glossary:

http://www.poetryfoundation.org/learning/glossary-terms

If you want to really study and buy a book, the Dictionary of Poetic Terms i really thorough.

http://www.amazon.com/Dictionary-Poetic-Terms-Jack-Myers/dp/1574411667

Meter is the real bugbear. The Poem's Heartbeat is an incredibly useful book for understanding prosody.

http://www.amazon.com/Poems-Heartbeat-Manual-Prosody-Classics/dp/1556592817/ref=sr_1_1?s=books&ie=UTF8&qid=1411274997&sr=1-1&keywords=poem%27s+heartbeat

But, some quick and dirty tips for stresses. Try whispering the word or sentence to yourself very quietly. The syllables that will sound the loudest are most likely the stressed ones.

Also, try switching stresses in syllables if you're not sure. For example: we pronounce window as WINdow (stressed, unstressed). But if you say winDOW (unstressed, stressed), it sounds wrong. Try playing around with stresses until it sounds right--because it's really easy to know when it's wrong.