Check out A #NoEstimates tool: The slicing meeting, replacing estimation meetings while creating shared understanding by vasco. Here is an excerpt:
Before we start, I’d like to thank to Neil Killick and Woody Zuill for inspiring this technique with their work.
Sit down. Let’s estimate
This is not a good start of a meeting for many of us. Asking for estimates may be an easy thing to do, but going through the process of estimating…
The full article is available here.