Those dealing with issues, another major thing that's helped me, is reframing your perspective. Another major thing is realizing the negative voice in your head is getting constant reinforcement from you (I'll probably talk about this some other time, I have a lot to do today).
Let's address some reframing:
Let's say you want to get stuff done, but you fear the response, have anxiety, are pessimistic, etc.
Two things regarding reframing all of that:
The first, is realize how insignificant you and others are. If you're fearing someone's response or caring what people think, consider how grand this universe is. There are numerous videos online, several gifs, etc. that just show you how small earth is compared to space. Then consider how small you and everybody else here is compared to earth. Realize then how small you are compared to the vast universe. Now if you're about to deal with someone's social judgement, your feelings about it, etc. consider how little we are compared to the grand scheme. That means, their judgement and what they think about you (and the negative shyt you think about yourself) really doesn't matter much now, does it?
The 2nd thing is consider that your physiological responses to stress are absolutely normal. There is nothing wrong with feeling anxiety, because it's just a feeling. It's your interpretation (voice in your head - your thougths) of that physical feeling that's making you go off the hinge and run on with a negative storyline. People who absolute get shyt done, dominate, etc. don't interpret the same feelings you do with a lack of ability, they view it as a normal reaction. Thus when it happens to you, being mindful of it so you could reframe it helps a ton. Remember, even the most famous of performers get the jitters, but those jitters don't have anything to do with them performing on stage. It's absolutely separate from ability/will.
Both are great things to keep in mind when it comes to reframing your perspective. But the real trick is catching yourself when you do this. That is where meditation training helps, even better active mindful "practice" when you're going by with your day-to-day activities.
Regarding that last part:
Enlightenment is just a state of acceptance. You don't reach enlightenment as much as you choose to be enlightened, which is being accepting of what life dishes out to you for what it is. None of this is personal, until you make it personal (lead by the voice in your head). In order to stop making things personal, remember, "it's just life." You can't control everything that happens to you, circumstances just are what they are, it's all nearly a probability anyway. Straight up random number generators. When you start casting your judgement/thoughts/voice in your head onto shyt, you really miss out on the overall experience: that is life itself. One great thing about living is pretty much just living and being able to experience.