Every day is a risk. When you get out of bed in the morning you are risking being awake for an awful day. You are risking getting in a crash when you step into your car. Going to school means you are risking listening to dumb, annoying comments from obnoxious kids in class. By going out on the weekend means you might miss Jake Gyllenhaal when he stops by your house.
Well maybe that last one was a stretch, but you're paying attention again aren't you?
Every thing a person does is a risk. When the positive aspects out weigh the negative, you know risk is worth taking.
Though you day could be awful it could be the best day ever. You could go on an amazing adventure. You could meet someone who despises the obnoxious kids as much as you and now you have someone to laugh at them, along with a new friend. You could have the most fun you have had in ages.
There is a phrase that seems to be following me around all year and it applies to this topic as well. "This too shall pass..." Even if you take a risk and it ends up being a bad idea the negative consequences will pass (unless you are really dumb...). And if you are just on a streak of good luck when all your risks are paying off, you will run into a risk that takes a turn for the worse, so don't get to cocky.
For the most part risks are a good thing and even if you take a risk you shouldn't have you are able to learn from them. Most risks, even if they don't turn out well, aren't life or death. Taking risks is a part of life. They help people grow.
If you are unsure of something, go for it.
If you are really really really unsure, it isn't worth it.
Part of life is learning what risks are good and which are not. But sometimes to learn that you need to make some bad decisions first.