The key skill for taking good "executive type" meeting minutes is summarization.
You need be able to listen and understand what's being said and to boil it down to the most relevant information pieces / decisions in the conversation.
Bullet points are your friends.
There are different frameworks you can use for notes, the one I like to use is Context - Action - Result. On the given topic I write 1 or 2 bullet points for each of those, 1 or 2 sentences max. Use direct order and keep it as short as possible.
Context: What's the issue / topic, initial statement. Include
relevant 5W2H (What, Who, When, Where, Why, How, How Much) here
Action: What was done regarding this topic. Include additional points
brought up during the meeting that are relevant to topic
- Result: What was the reported outcome. Decisions that were made
regarding the issue
A few options of summarizing exercises:
- Summarize a short or medium text like a blog post, newspaper column or article. Start with 2 bullet points for each paragraph and work on getting it shorter. Ask for feedback on the exercise by giving the article and your summary to someone.
- Use a recording (video or audio) of a meeting you typically take minutes
- Use your previous minutes and try to summarize them