Talking until the last minute is a common mistake many speakers make.
For an hour-long presentation, plan for 45 minutes of talking and 15 minutes for questions.

Leave time for questions

Talk to persuade, not just to inform.
Rattling off facts and figures and talking at the audience isn't effective if they aren't interested in what you are saying.
Be clear about what you want the audience to walk away with when they leave and use that intent as a structure to frame your talk.

Emphasize connection over content

Know who you are speaking to. It will help you tailor the talk and will help keep the audience engaged.
Is the audience of your speech going to be mainly fellow psychologists, health professionals, other professional groups, students or consumers? What do they want and need to hear?

Know your audience

Use humor, an engaging video or other media to present various aspects of topics that needs deeper exploration.

Don't lecture the whole time

Use visual tools (such as slides or a video) as an aid. Incorporate research and tell stories. Use anecdotes as an effective way to connect with your audience.

Diversify your delivery

Determine your main points and outline them. 
Use notes or PowerPoint or Keynote slides as prompts. Avoid using only words. Use slides for emphasis.

Stick to your points

Authenticity—sounding like yourself and using everyday language—is key to getting your message across to an audience,

Be authentic

Have a run-through in the space you'll be speaking at if possible and test the tech system for possible problems. 

For instance, the sound may not run properly with your video or your slides may be set up behind you and prevent you from seeing where you are in your talk.

Know the setup

"I imagine that I'm going to present to my grandmother, who had a fifth-grade education." Barry Schwartz, PhD
Remember that there also used to be a time when you didn't know the information you are delivering. 
Give a talk that makes people feel like they're smart and like they want to learn more about the topic.

Keep it simple

Using different media in your talk makes it more dynamic and compelling. It creates energy and vibrancy. 

Think about ways to use slides, video, audio, handouts, props, and even spontaneous smartphone polls to engage your audience.

Know your audience

Similar ideas to Know your audience

Know your audience

Identify your audience

Saying What The Audience Wants To Hear