Don't bother just to be better than your contemporaries or predecessors. Try to be better than yourself.
The key to successful investing is to have a strong understanding of the fundamentals, a disciplined approach, a clear understanding of the market, a long-term perspective, and a clear understanding of the risks and rewards.
Success is not about the destination, but the journey and what you learn along the way.
You can't change what's already happened, so focus on the present moment.