The best analogies compare and contrast your chosen subject with something completely different, that serves to illustrate the point being made or explained.
Analogy: Speaking professionally is like baking a cake. It has many ingredients. If you miss too many out, your speech won't be as tasty. Like baking a cake, make sure it's ready. Take it out of the oven too early and it will be a soggy mess.
Analogy: Imagine your desire is a rocket. The rocket itself is your thoughts, clarity, direction. Your emotions are the rocket fuel. With no emotion your rocket goes nowhere. It's an empty shell. With no rocket your fuel spills everywhere and you manifest in all directions. You need to combine clear thought with emotion to manifest a specific desire effectively.
Analogy: Learning a new skill is like rock climbing. Yes it's good to know where you are going, to the top, though you can't get to the top just by focusing on the outcome. What matters is the process. The act of putting one foot and one hand after the other, step by step, until you get to the top. Similarly it's all the consistent and often small actions that lead to you developing a new skill.