Saving Room for a Title

[Wildcard]

I sometimes forget to title the poem until I am happy with the contents. This has been the cause of a lot of extra time spent on each poem. It's important that I choose a name that doesn't 'give away' the entire poem or spoil any surprises. That being said, I don't want to repeat anything inside the poem either or the first line (Thanks Todd) So for me, quoting is normally out.

How do you choose a title? (and when? before, during or after)