I'm sorry, Rita, but this is the first time I've come across this thread!
Here are questions I try to answer when analysing poetry:
On the simplest level, what is this poem actually about? What kind of poem is it - an epic, a sonnet, a haiku? What is the metre?
Why has the poet chosen to write about this subject? If it is a very odd topic, could he be using it as a metaphor for something else? Are his motives political? Religious? Why has he chosen to use the metre and pattern of lineation that he has?
How does form cohere with content? This is an extension of the last 'why' question. How exactly does that precise line break, that unusually positioned comma, contribute to the poem's meaning? Is the effect semantic or purely prosodic?
When was the poem born? This question is not important for all poems - only for those that emerge from a particularly interesting historical context, or a pivotal moment in the poet's life, that may have shaped his writing.
It is important to identify things such as similes and metaphors, but only if you can do something with them and make them support your argument. It is not enough to say, "The fourth line is especially alliterative." That is only the what
and a little bit of the how
. Go on to talk about the effect the alliteration produces and why the poet may have chosen to use it. Don't aim to include as much specialist literary terminology if it isn't relevant to your analysis.
I always used to anaylse poetry line by line- look out for the symbolic meanings behind stuff.
This is only half of it. Poems can be dissected in this way, but you should also look for overarching meanings - sometimes a poet will use sustained metaphor, beginning in line six and finishing with the very last word of the poem. If you focus on each microscopic element of the poem you will miss the bigger picture. Take 'close ups', but make sure you view the poem from a distance as well.