There is much talk in the religious, scientific and metaphysical communities about what sort of change we can expect our world to undergo thanks to prophecies based on the ancient Mayan calendar. A speech based upon this topic will require an understanding of the background of your audience. Are they a group of paranormal enthusiasts already familiar with the Mayan prophecy or skeptics who really have no knowledge surrounding the predicted events? Research and present clearly the prophecies, describing some of the projected outcomes. For added visual effect, consider gathering together images of prophesied outcomes to the Earth to display along with your speech.
If you have access to portable gym equipment or workout wear, this speech could be an informative and comic choice. Offer your audience a guided demonstration of some the latest workout equipment fads, giving them a first-hand account of the pros and cons of their usage. If your audience is small or has the flexibility to travel for your speech presentation, give your speech at a local gym or exercise room. This speech would appeal to an audience of exercise enthusiasts, athletes or those looking to add an exercise regime to their lifestyle.
This topic is another that would benefit from having visual (and olfactory!) aids. Bring some fast food to your speech location and, before long, the smell will permeate the room. Even those audience members in the cheap seats who can't see their origins will smell the enticing aromas. Begin this speech by explaining the means fast-food distributors utilize to create the desire for more in the consumer who regularly eats their products. The book "Fast Food Nation" by Eric Schlosser provides a wealth of information to prepare you for this compelling speech topic.
Once as American as apple pie, the concept of saving for your golden years -- years spent traveling around the country in an R.V. -- has become a questionable one. Since the massive downturn in the stock market has left many retirement plan investors with drastic reductions in their holdings, many have altered their expectations of a carefree retirement at age 65. Whether your audience is comprised of young adults just beginning their working life or a group of near retirees, covering current investment possibilities and the new ways of perceiving life as an older adult in America can captivate audiences young and old.