From the article (by Scott Ambler):

UML 2 activity diagrams are typically used for business process modeling, for modeling the logic captured by a single  use case or usage scenario, or for modeling the detailed logic of a  business rule.  Although UML activity diagrams could potentially model the internal logic of a complex operation it would be far better to simply rewrite the operation so that it is simple enough that you don’t require an activity diagram. In many ways UML activity diagrams are the object-oriented equivalent of  flow charts and  data flow diagrams (DFDs) from structured development. 

Project management for incremental delivery / iterative development projects by Johanna Rothman

A rolling wave plan is a continuous detailed schedule that's only a few weeks long. As you complete one week of detailed schedule, you add another week to the end of the schedule. With a four- week rolling wave schedule, I never have less than four weeks of detailed schedule, and I never have more than four weeks of detailed schedule.

Managing prioritization with a whiteboard, and the Happy Brian List.

An excellent introduction to, overview of and fairly comprehensive discussion on continuous integrations. Here's an excerpt from the page: "Continuous Integration is a software development practice where members of a team integrate their work frequently, usually each person integrates at least daily - leading to multiple integrations per day. Each integration is verified by an automated build (including test) to detect integration errors as quickly as possible. Many teams find that this approach leads to significantly reduced integration problems and allows a team to develop cohesive software more rapidly. This article is a quick overview of Continuous Integration summarizing the technique and its current usage."

From Rachel Davies:

In the last few years, the agile software development movement has created a paradigm shift in how we work to understand system requirements. Agile teams shape software systems using a collaborative process, with executable software at its heart and documents marginalised to a peripheral role. This creates a fundamental shift away from tools for managing requirements artefacts. Instead, we need tools that support collaboration and the gradual distillation of business rules into automated test suites.

Burndown is a technique used in Scrum projects for tracking the progress within or across sprints. It is an exciting way to track how a team is progressing against a deadline - and we can apply it to any form of project-status. In this article, we will apply it to documenting business processes.

Discussion of agile vs traditional requirements management

Useful list of possible approaches to make up iterations in agile product development.

Lists 9 reasons why your dev team will benefit from dividing user stories into tasks.  A couple of paragraphs of detail for each reason.

Very detailed analysis of how usability can be a key component of agile methodologies. Explores the misconceptions and challenges of both schools with respect to the other. Details the agile development methodology. Contrasts the philosophies of both agile and UEX approaches. Discusses user-experience modeling in an agile framework with great examples and explanations.