If you’re feeling nervous about an exam, a presentation… or anything really, put on a killer outfit. After you have prepared all you can for the actual thing you are nervous about, put on a fresh face, your favourite shoes, some pretty jewelry and an outfit that makes you feel good. They say confidence is sexy, which is true, but it’s also extremely powerful. If you feel good, you will give the allusion that you are absolutely are the best.
There are days when sweats are appropriate but for the most part, sweats outside of the comfort of your home are depressing. That being said, if that is what you are most comfortable in and you feel great then go for it; you will radiate that feeling. I personally feel my best when I’ve had time to freshen up my makeup and hair - doesn’t have to be anything fancy - am wearing dark colours and have at least one statement item, like my buckled shoes or my antique ring. No one will notice these little things all together and they won’t know why they are special to you, but that’s why it’s so fun.
To finish with a cheesy little message: when you are confident in yourself, you can accomplish anything.