We have all faced situations where we regret the decisions that we have made, which as a result have let us to where we are.
At one point or another we have all said to ourselves "Had I known what I know now, I would have made a different decision".

We definitively need to keep in mind what we have done in the past, as everything is a learning experience. At the same time, we should not worry so much about what we have already done, but rather think about what we can do. I agree that you should consider what you have done in the past, but do not dwell on it, as it is the past, and can no longer be changed.

Again, my point is think about the future, rather than the past.

The way I see life is that we shall all face great challenges. When we are able to surpass those challenges in front of us, we feel great. We feel that we have accomplished something great. When we fail, we feel horrible.

But do not be disappointed. Failing in one aspect only changes the road that you are traveling, it does not block you from moving forward in life.

So never give up, there is always hope in teh future.

Enjoy what you have and don't take for granted the great conveniences that you have.