Having a long, rambling presentation that is hard to follow is not going to win you any audience interest. You need to make sure that your presentation is clear and focused and that any asides you throw into it are there to back up the main point.  It's best to have 1 main thesis statement or overarching theme and 3 main points that back-up or flesh-out your main theme. Any more than that and your audience is going to start losing interest. This means that any facts and information that are a part of your presentation should back up these 3 main points and overarching theme. For example: If you're giving a presentation about 17th century alchemy, bringing up the history of alchemy is fine (and probably necessary), but don't mire your audience in its history instead of focusing alchemy in the 17th century. Your 3 points could be something like "alchemy in public opinion," "famous 17th century alchemists," and "the legacy of 17th century alchemy." You don't want to overwhelm your audience with information and important points. Even if they're interested in your topic they'll starting spacing out and then you've lost them. You need to stick to your 3 points and overall point and you need to make sure that you only use the information that you need to support and clarify those points. Pick your very best supporting facts, information, or quotes for your presentation. Don't bury your audience in information. It isn't always necessary to use a powerpoint, or visual representation, especially if you're already an engaging speaker and have interesting subject matter. In fact, a lot of times, using visual media simply distracts from the focal point, that is the presentation.  Make sure you're using media to enhance your presentation and not to drown it out. The presentation is key. Anything else is just accessorizing. For example: to get back to 17th century alchemy, to back up your information about alchemy in the public opinion, you might want to show images from public pamphlets about the dangers of alchemy and see what people of the time period had to say about it and see what the more famous alchemists had to say about it. Also, you want to make sure that you pick a medium that you are comfortable in and thorough in knowledge. If you don't know a thing about powerpoint, maybe consider writing your main points on a white board, or passing out handouts with your main points and evidence on them. This is one that for some reason, lack of time perhaps, people neglect to do and it is absolutely key to giving a good presentation. Running through the presentation before the actual event gives you time work out any kinks or problems with your notes and with your technology and makes the presentation itself go more smoothly.  A good tip is to film yourself or audiotape of yourself giving your practice presentation so you can see what distracting verbal and physical tics you have, so that you can work on eliminating them before the presentation itself. (Verbs tics would be things like "um..." and "uh..." and using "like" inappropriately; physical tics are things like shifting your weight from foot to foot or messing with your hair.) Just remember that rehearsals usually run about 20% shorter than your actual presentation, so take that into account if you're running on a time limit. It may seem like a silly thing to do, but visualizing a successful presentation can actually help you achieve a successful presentation. You'll be more inclined towards success if you've been prepping your brain for it. So beforehand, sit somewhere quietly for a few minutes and picture the presentation going well. You want to dress for success. Wearing nicer clothes can help get you into the mindset of giving a good presentation. You also want to be comfortable, however, so you should try to find a reasonable medium between dressing super snazzy and dressing comfortably.  For example, if you aren't comfortable wearing heels, don't wear them just for the presentation. You'll be distracted by your discomfort and that will come across in the presentation. There are plenty of good shoe choices that have no or a low heel. Clean, nice slacks or a skirt and nice, button-down shirt in neutral colors are always good choices for presentation wear. You also don't particularly want your clothing choice to distract from the presentation, so perhaps avoid that brilliant hot pink shirt.
اجعل العرض التقديمي مكثفًا. القليل كثير. قرر إن كنت تحتاج لاستخدام الوسائط المتعددة أم لا. تدرَّب على إقاء العرض التقديمي. تخيَّل نجاحك. ارتدِ ملابس مناسبة.