Opportunities are like buses, if you miss one, there's always another one coming.
You might have heard this somewhere. This isn't some random quote that you find on your Facebook feed. It's quite valid.
Absolutely, you don't have to say yes to every opportunity that comes your way. Sometimes, letting an opportunity slip can actually save you from a disastrous situation.
Therefore, it's essential to cherry pick anything you say yes to. That is how you decrease your chances of screwing up.
However, too much of cherry picking can keep you at loss.
You see, opportunities don't come flying on their own. They come from people. When you keep saying no to every opportunity that comes your way, they are gonna stop coming.
People don't like handing offers to those who keep turning them down.
You gotta say yes to something. Keep yourself open.
You're never fully prepared. Just jump right in.
The initial quote, while very true, holds valid only to a certain limit. Make sure you steer clear of that limit and you'll be fine.
Say yes, often. Say no, only when you think any opportunity is not the right fit for you.