Mistakes
1. Some people take the wrong approach by making the topic even more convoluted on purpose to make themselves sound more intelligent.
2. Others assume that their counter party they are speaking to is more knowledgeable on the topic than they actually are and make crucial false assumptions.
3. Another fallacy is to not clearly and explicitly explain the purpose up front of why you are speaking and why your listener should care.
However, there are a few steps to take to ensure that your point gets across. These pieces of advice are relevant in almost any circumstance when a complex topic must be explained. This is due to the fact that they appeal to human nature and I will show you how this can be accomplished.
How to make a complex topic clear?
1. Use metaphors. OFTEN. Metaphors are the key to helping people understand anything new. You have to know your audience for you to create a metaphor that is effective. Metaphors should be used so often that you should use at least one in nearly every minute of dialogue. Metaphors and analogies simply help people connect to you by relationship building - this is human nature.
They can be a simple as this example. Lets suppose that you want to convince a friend to invest in a solid and steady dividend stock with a lower (but less risky) return than a new high tech company. You could say
"Lets assume that you have $1000 to invest. Would you rather have a mailman show up at your door every three months and give you an additional $20 in your wallet? Or would you rather play poker and watch your $1000 go up to $1200, down to $700, up to $1100, down to $800, etc., every time you ask the deal what your stake in the game is currently at."