Whether you publish authoritative content on your blog, on Twitter, as online videos, or another format, you're missing opportunities to reach a larger audience if you cast a narrow net.In other words, if you diversify the type of authoritative content you publish, that content will appeal to broader audiences. Not everyone likes to read blogs just as not everyone likes to watch online videos. For maximum exposure and growth, offer diverse types of content as well as diverse ways for people to consumer your content.Following are 15 types of content you can add to your content mix without completely scrapping your existing content strategy. Each of the types of content listed below, sourced from Content Marketing for Dummies, can be easily added to your content plan at anytime. For example, if you write a blog, you can easily discuss and link to or embed the types of content listed below directly into your blog content.

1. Blog Posts and Articles

Writing blog posts on your own blog is a great start. You can cross-promote your blog content by writing guest posts on other blogs and submitting authoritative articles to sites that accept guest contributions.

2. Ebooks

Pull together a group of your best blog posts related to a specific topic and rewrite them into a single ebook that your audience can download and share. You can also create an ebook with completely new content that you've never discussed online before.

3. White Papers

White papers are typically more technical and more research-heavy than ebooks. Therefore, they're a perfect tool for truly establishing your expertise and authority in your subject-matter.

4. Comments

Anytime you publish a comment on Twitter, Facebook, LinkedIn, other blogs, online forums, or other social websites you have an opportunity to share a piece of your expertise and authoritative content.

5. Photos and Images

Use websites like Flickr, Tumblr, and Pinterest to upload, share, like, and comment on your own photos and images as well as those shared by other people. Images are important content, too, and they're a great way to add visual interest to your text-heavy content.

6. Infographics

Infographics are incredibly popular these days. Anytime you have statistical data that you could present in a more visual manner, consider creating an infographic. They are highly shareable and have great potential to go viral.

7. Videos

With mobile device ownership reaching new heights of popularity, online video is easier for people to watch than ever. If you haven't started creating online video and publishing it to your own YouTube channel or similar site, now is the time to do it!

8. Livestreaming

Video is great, but live video can be even better because it offers an added sense of excitement. Tools like Watershed by uStream and Livestream offer a variety of options and can integrate with Facebook and other social networks and tools.

9. Podcasts

Thanks to tools like Podbean and BlogTalkRadio, it's very easy to host your own podcast or online talk show and make that content available through your blog, website, or even iTunes!

10. Tutorials

You can create tutorials as written step-by-step instructions, as videos, as slide shows, and more. Everyone likes to learn how to accomplish a difficult or confusing task, so make it easy for them with easy-to-understand and entertaining tutorials.

11. Screencasts

Screencasts are used to record both your voice or chosen audio and the activity on your computer screen. They're most often used to explain how to accomplish an online task. Tools like Camtasia Studio and Screencast-o-Matic, make it easy to create your own screencasts.

12. Webinars

Using a tool like GoToMeeting, GoToWebinar, or WebEx, you can host your own online meetings and webinars where you can lead a discussion or seminar while attendees listen, learn, and ask questions.

13. Presentations

You can turn sales presentations, marketing materials, seminars, tutorials, and more into slideshow presentations, and then upload them to a site like SlideShare where people can view, comment, and share them. It's easy to embed your presentations into your website or blog using SlideShare, too.

14. Polls and Surveys

Polls and surveys are great for market research or just for fun. People love to share their opinions, so polls and surveys make your content more interactive instantly. For example, it takes just seconds to create and publish a free poll in one of your blog posts using Polldaddy.

15. Online and Mobile Video Presentations

Why just create videos or presentations when you can also create video presentations that can be viewed online or via mobile devices? Using a tool like Brainshark, you can turn a PowerPoint presentation into a video presentation (with audio) that can be viewed on-demand and tracked. The SlideShark app makes it easy to turn that PowerPoint presentation into an iPad-friendly show.Image: soopahtoe