The only thing I can think of would be growing up and not staying in my 20s. I know we have no choice but for me my 20s were awesome beyond anyones wildest dreams and I miss it all now. Even though that was 40 years + ago, it seems like yesterday. I would say all the little mistakes I made thru life made me better and stronger than ever, and its these life experiences I pass on to others on here so hopefully they won't make the same mistakes I did.