Treat each day like you don't have a position in the stock and that you 'just came across it'.
Then do/review your DD.
Then decide whether it is a buy, or a 'wait and see'.
If it is a 'wait and see', but you already own a position because of a previous decision then consider selling a portion or all, and move on to another stock that you deem has better potential.
If it is a 'buy' then hold your previous position, or take an initial starter position.
And continue your daily DD routine, and execute accordingly.
Not every investor can leave their ego at the door before entering the market.
Just realize that that it takes a good deal of experience to become objective about buying and selling because, after all, money is involved, and very few people can be dispassionate about making or losing it.
Those that can do so are ultimately succesful.