A lesson you learned the hard way and the way you learned it?
923094
That is so funny!!  That is certainly a story you'll share for years to come (plus, it will be a story your FRIENDS will share at the most inopportune times, I'm sure).
836108
You regret that you didn't have the experience to do it better the first time around.
485982
Some do and some are learned.
84553
Trial and error dude ! There is only learning the hard way!
454117
Learn from your mistakes and keep your head up.  Things really could be worse.
231198
Because you learned your lesson the first time around!
488725
learn from your experience
1061617
i think i've learnt that;\n1. there's a lot of hard questions out there\n2.i'm not as smart as i like to think i am\n3.i'm not as smart as i look\n4.and when it get's too difficult i turn my pc off and watch the tv
851365
later in life you might regret the chances you did not take.
313467
yes i think we should learn a lesson and be hurt first to be able to see what were doin wrong... and people are like that we are all numb when it comes to others feelings, we need to be hit first with a big rock!and you know,people are people,we are all just the same we just hate to admit it!
233643
i have learned from my mistakes from the past so that in the future less mistakes can be made which means a peacefull and mistake free future..... yeah right we'r humans mistakes will always happen, just try your best to learn from them! \n\nit sucks but i think i learn best from my mistakes especialy if it hurts
452702
I make mistakes big ones small ones good ones and bad ones. I learn from my mistakes and I grow from them. I gain knowledge and wisdom from them. All those mistakes I've made, make up who I am today. It seems like you get 5 or 6 split second decisions that change the course of your life forever.
23890
Life is a journey.  If you aren't learning something new everyday, you aren't doing it (life) correctly.
363280
It sounds a bit of a cop out but I would have to say the most important thing I have learnt is how to learn.  That and making mistakes is OK and part of life.  No I didn't learn this at school which is why I have gone into teaching to try and bridge the gap
985943
"You learn from your mistakes"\nTry that.
886396
Did I learn something from this question, or not.
192764
To not learn from a failure is the most difficult and costly.  Best to learn something the easier way by pre-discussion with somebody who knows the thing you need to learn or know: Such a habit will have you blundering much less and also spare yourself some of your difficulties.