The most important in Agile Methods is start slow to grow fast, for example, with scrum, if you try to from zero to all scrum meetings in the same step is almost right that you will abandon scrum, the idea is put one scrum meeting for each step, when the group is confortable with one of the scrum meeting and feels that need more, you introduce a new one. The best for the start is the retrospective meeting, for resolve the problems, and grow to planning meeting. There are exceptions that you go from zero to all and works but is not so good!