Hi OP
For team work, I would not use that example. Sorry but it could make it look like you cannot be as persuasive as they would like and they only listened to you as their idea fell foul of the audience. Try and think of times when there has been give and take in a team, you help others and they've later helped you or you all pulled together in a crisis to achieve a deadline or important goal. Do you have anyone in your company who knows you well who can help you think of examples? I know it is very hard to think of these examples at times but others can come up with things.
For communication, I will assume the aim is to find out how you adjust your communication styles for various audiences. For example, my last interview I described the style I would write to a senior manager I knew (friendly but brief as they were busy and I know they like to get to the point) versus how I would write to someone externally (more formal, ensure that there are no in house abbreviations, be clear and to the point, ensure I was clear on the purpose of the email).
Analysis and problem solving - I would not use that example as you do not want anyone to know you had to have help as that goes against you proving you can do this. Try and think of times where you have come up against an issue and how you went about solving it. What did you do and what steps did you take to rectify it?
Creativity - that sounds a good example but I would leave out the ability to see who has done very little and make the point that you created it to maximise productivity as you can see where maybe staff have a little less on their plate to help those who have more to do. Something like that. Positive spin.
For the interview, my suggestion is practice. I am like you and can waffle, especially if I am nervous. A PP mentioned the STAR response and that is a great basis for formulating your answers. STAR is Situation, Task, Action, Result. If you Google it, there are loads of pages that can help you formulate really good answers. What interviewers want to hear is examples of what you can do. Anyone can say they are a good team player or are organised, the idea of the answer is to show them a time when you have demonstrated that skill.
Ask your hubby to collect Interview questions, and then craft answers based on STAR and practice them over and over again.
Unless you need a portfolio to show how you do your job i.e. graphic designer then I wouldn't take one but hard to say without knowing the job.