Overly preparing and memorization can lead to a forced, inauthentic talk. Too little, and you risk missing key points and appearing nonchalant and indifferent to the topic. While everyone prepares differently, I’ve found writing down my key points in bullet form (instead of a fully written speech), paired with a live rehearsal (or two) with a partner helps to ensure a solid, authentic delivery.
This may sound simplistic, but it’s important to keep in mind. The more your personality shines through, the easier it is for your audience to connect with you. For me, I try to keep my audience smiling and engaged by using light humor throughout to break up the subject matter. I never take myself too seriously, and I think that type of vulnerability increases relatability.