Perfect, you've asked exactly the right question! "Well actually", you're saying to yourself right now, "I wasn't really asking a question, I was just expressing my frustration". Your brain disagrees. It is wired to help you through even the most difficult times in your life, and so while you just wanted to express frustration, your brain actually did ask a question, and it expects you to answer it.
What is the point? What is your point? What are you doing all this for anyways? There is an answer and it is true no matter what situation you are in. You have been placed on this planet for a reason. Some people argue that this reason is written in stone or on a cloud somewhere in the Big Guy's master plan. Some argue that the reason is to simply be you. Doesn't matter. What matters is that deep down inside of you, there is a reason that you came into being and that you do everything you do.
Think about it for a minute. What made you call the number on that business card that normally you would have thrown in the garbage? What made you look twice at that woman in the coffee shop? Why did you check out that website instead of getting back to work? Why did you bother to answer your 3-year-old's question about why bicycle wheels are round? Why did you ignore that phone message but respond to the other email?
The best part, the part that our brain is trying to remind us of, is that no matter how frustrated and discouraged we get, we can't help ourselves be what we are. We can't stop "the point". The point is what keeps us going. Remembering the point is what keeps us motivated and feeling positive even in our most difficult moments. Maybe you are out of money...but something inside of you creates an opportunity that could turn everything around. Maybe you have no more answers for your kids...but a voice inside finds the right words. Maybe you are facing professional challenges that even Bill Gates would find tough...but you always seem to come up with another solution. Maybe you are suffering from too much positive (too many projects to complete, too many people to meet with, too much money to manage, too many demands on your time and energy)...but you see in this challenge the opportunity to finally contribute what you know you must.
So whenever you are asking yourself "what's the point", answer. Remember your point, your purpose for being on this planet. And trust it. It will get you through this and every other challenge in your life.
And if you don't know what it is, think back to better times when you were full of energy: what did you KNOW deep inside of you, what were you convinced you were RIGHT about, what was so EASY? That's your point. Write it down and keep it close to you.