What do I need to remember when I negotiate brokerage rates with my broker?

When I deal with a sub-broker, do I have to pay extra over and above what I pay as brokerage? How do I go about selecting my sub broker?

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

When I trade intraday is brokerage my only cost in the market?

My broker has assured me that any open positions he will close. Do I still need to worry about closing all my open intraday positions?

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

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

What happens to the value of the call and put options under Black & Scholes when the interest rates in the economy move down due to RBI repo rate cut?

If I sell shares, by when do I need to give the DIS slip to the broker?

Once I transfer funds into my broker account, are there are any specific documents that I need to maintain?

My broker tells me that I need to develop an investment mindset. What does that mean? Does it mean keeping cool or being brave?