Did you ever attend a scheduled meeting or phone conversation with one agenda item and you end up talking about something completely different?
It’s not always a bad thing if a new, more urgent topic comes up and you choose to address it. If that’s what happens, it’s fine – as long as the original issues doesn’t fall by the wayside.
One way to avoid this, is simply to open the meeting with a statement of purpose. It can be one sentence but once you put it out there, you and the other guy(s) at the meeting are starting on the same page. If another topic is suggested and you want to deviate from your plan, that’s fine as long as you all set another time to discuss the stated topic.
It goes along with an older post I wrote about Inverting Your Phone Calls.
Pretty simple stuff but if you do it, you’ll be making much better use of your meeting time.