Sometimes it is easier than said, the emotions or non logical portion of you that takes over. Trying to refrain from those negatives. Trading in stocks, is like making an investment planning. For me, it is part of long term planning. Plan and diversify your investment (several baskets, not confine to stocks) so that you do not get affected too much. Do progressive buy in batches or selling(cash out when need) to maintain.
Make use of this time to read and to understand the companies better and ...

During my earlier years when startes experimenting with stocks, I did set a loss and profit cut off at around 10% of the base. But as i aged with experience and focusing on buying good companies (blue chips, S&P), i review the losses as paper loss/interim losses.
Companies with good financial grounds and established markets, we all know that in long term, it will gain and profit. This is like placing our money in banks, we will generate gains for us (dividends). Based on past...