What do I need to remember when I am long term investor in stocks?

Do investors with long term view also need to keep an ear to the ground?

What are the basic rules that I need to remember as a long term investor in the stock markets?

As a long term investor in the stock markets, ideally how many stocks should I own in my portfolio? Does that really matter?

What do I need to remember when placing orders for intraday?

Do successful investors always focus on long-term strategies only?

Can you outline some basic steps that I must remember while I trade intraday in terms of identifying stocks? What are the steps I need to go through?

When do I need to reset my time frame for my investment and trades?

Due to bad news some good fundamental stocks falls very huge after that, can we add it in our portfolio, for long term investment?

What should I do in Capital Market , Short term Trading Swing Trading or Long Term Trading if I am 64+?

Why is it good to invest MF for the long term when they don't guarantee me the returns?