Look to the past reflectively, not regretfully. A lot of the time it can see all we do is failure, but our greatest failures emerge our greatest successes. You see, successful people aren't usually people who try something once and win it all, no, the only difference between a successful person and a non-successful person is a successful person can look back on his failures and learn from them. Look back at what you did wrong, try to critically analyze the situation and see what exactly happened, I don't know the situation so I can't help you with that part, but you just need to look back reflectively. The situation could be the problem, you might find that you were helping someone with a task that was too complex, you might find that emotional states are too fragile and sometimes it's best not to give advice to people who are super upset, but comfort them ("I'm here for you *huggles*") until they calm down a bit. These little things, help make a huge difference later in the future, as long as you can look at your failures and not see only that of the failure, but that of the learning experience. Every knock down should make you stronger until you're invincible.
