I have a favourite piece of advice, and I give it even though it frustrates many recipients. If you want to write, write! If you want to get into public speaking, speak in public! If you want to start a user group, start a user group! If you want to be an MVP, do what MVPs do (advise others and solve problems and volunteer for stuff) and you'll start to get the benefit even before you get the award. I'm not quite saying Just Do It but the fact is the barriers to entry are very very small these days and possibly non existent. Technical writing especially - start a blog or get active on newsgroups and presto, you're writing! Listen to feedback (people telling you you're wrong is bad, people thanking you for your answer or quoting you elsewhere is good) and you will get better. Public speaking isn't much harder to crack because the world is full of user group leaders and similar folks who need someone to speak to them month after month. It's also full of Code Camps and other places to get started (they tend to come with coaching and encouragement too.)
Still some people don't like this advice. They feel held back from what they want to do, and they don't like to be told "nothing is holding you back, you can start whenever you want." Alternatively, they don't want to speak or write or lead for free, they want to be paid for it, and they don't like the idea of starting for free and working hard for years to get that overnight success. So here's a rephrasing that maybe you'll prefer: "80% of success is just showing up." It's attributed to Woody Allen, not a guy I would normally take advice from, but it sure is accurate. Go to the meeting, open the document you're supposed to be writing, be there when someone asks for volunteers, go to the whiteboard and draw as much as you know, put your shoes on and go outside, ... not all at once of course, but these are the "just showing up" tasks that get you on the road to success. Try it.