Well, people have come up with books and what not but for you guys I will capture the essence of all that in just few , easy to remember rules:
1. While introducing your point beat around the bush. For example if you want to say that - I am here to ask you to read my blog - instead of saying it in plain simple way, Say - "Today as I stand in front of you, in this chilling January cold, with my hand on my keyboard (while the other is busy scratching my back), I am not just entering random words on the screen (that I do in my blog!), I am trying to attract your attention to something that has the power to change the way you think, you work, you perceive life and in fact this something can change your entire life and this is not some kind of a magic medicine that I am talking about. I am talking about my blog - "big daddy's guide to life". So I request each and every one of you to please take time out of your busy schedules and have a look at these sincere words which come straight from my heart."
2. Include thoughts/sentences of great people e.g. Winston Benjamin once famously said that "Whether or not you become great is a matter of chance but whether or not you want to become great is a matter of choice."
Now if you think that remembering lines of great people is a pain, first of all if it is a pain for you it is pain for others as well. So whatever lines and names you remember just say it. (Could you find out when I quoted Winston Benjamin that actually Winston Benjamin is a West Indies Fast Bowler and if you google the quoted line you'd get some results like Princess Bride etc.)
3. Include some stories in your speech so that if people are not interested in your speech at least they will try to listen to the story. It is expected that the story has at least some relation with the message that is supposed to be conveyed through the speech yet you may always innovat e and tell absolutely unrelated story.
4. Always make it a point to criticize the system here in India. Everybody feels that (s)he is not as big a success because of the system or (s)he is a big success despite the system and hence people will readily agree. See you want most of your audience to agree with your point so try first state some obvious points that the audience will surely agree to and once they get into that habit of agreeing pass off your point - at least a few will fall for it.
5. Never miss the audience - talk about them, everyone wants to be talked about so does your audience. Praise the audience (even if it is insincere but be judicious!). Show faith in them - use expressions like "Nothing is impossible for audience like you, its just matter of resolve / you guyz are absolutely wonderful etc."
6. Always end with a question - if possible an interesting one so that the audience will be busy thinking about the answer of the question rather than the poor quality of your speech ( poor quality -thanks to these guidelines), see it is like after an aweful meal if you get a very nice ice cream or a dessert its taste keeps lingering in your mouth and you tend to overlook the aweful meal. e.g. "All said and done - at the end it all depends on the God's will (wish) just like - who will win this year's French open (which depends on the tennis God Roger Federer's wish :-))? (Smart speaker will use a more generic question(like wheather Katrina will marry Salman/whether Vidarbha will ever be a separte state?/Whether KGV's blog will ever become interesting and popular? etc.) instead of French open because not many people are interested in Tennis)
With these 6 points as the six stumps in the ground start your new innings in lecturing! May the force be with you!