Protagonist Lazy Day...Help!

Hmm, off the top of my head...have her witness an altercation that has something to do with the tense situation. Or throw in a new character to interact with her about the impending war. Or omgz, poisoned soy latte!

ETA: If you haven't already drawn out an outline, maybe you can do a very loose one based on what happens next. That often helps me when I get stuck in a rut.

^agreed with what Putputt said. Roughly go through what might happen next. Or even do as you said and just write the scene in third person if that helps you. You could always go back and switch it to first person in the editing stage.

You're working out the first draft of this story, right? Then don't worry about what the final form will be. Right now your job (that you've already accepted by beginning NaNo, congratulations! ) is to write your way from the opening line to THE END. Take as many detours as you need. Just keep following the story.

If you're stuck about what to do with your character in the coffee shop, then consider her "on hold" for the moment and focus your attention on where you think the story is happening. If you need to work out what happens while she's off stage, do it. Write the scene with the love interest in the planning meeting. Maybe what happens in that meeting will point you at what happens next.

Remember, also, that you don't need to detail every moment of your characters' lives. If nothing happens while she's in the coffee shop, that's fine. Skip over that time and move on to the next interesting bit. Maybe something happens later when she meets with the love interest after the meeting.

Once you have a completed first draft and can see the whole story from beginning to end, that's when you decide on the best way of relating the tale. For now, just keep writing.

Good luck!