Being more organized. A place for everything, and everything in its place, but not to such an extreme that it becomes an obsession.
I'm afraid I haven't changed my habits. I wish, however, I had developed certain skills and attitudes earlier than I finally managed to.
Saving money, but that's darn near impossible when a person is only making $9-$10 per hour. Getting stuck, for so many years, in the Shipping/Receiving/Warehouse/Stockroom jobs, instead of getting the education (that I finally got later) to work in an office in Purchasing and Inventory. Wasted way to many years doing physical labor.
I'll go with being more organized. Organization is my achilles heel. I get it done, but it takes a little more effort.
I wish I'd been able to start saving much earlier than I did... Exact opposite to me @Gloria Mitchell , I've been competitive all my life....
I did and still do have a problem with boredom. When I achieved whatever I wanted to achieve, I got bored with it and went on to another venture / adventure. But then, had things been even a little different, I might not have embarked on an adventure I will never be bored with which is meeting and marrying my wife.
I wish I had not made the mistakes I made when I was younger. I wish I had the knowledge that I have now when I was younger. But like my father would say wish in one hand and sh*t in the other and see which get full first.