I like to look at trading from a probs/stats point-of-view. I find you really have to meticulously track your prior trades and be able to examine them in a way pro athletes use stat lines in order to be able to compare your trades against prior trades and expected results. This allows you to identify what exactly you need to work on. Without meticulously tracking your results it's impossible to do the analysis; with spreadsheets etc tracking is easy to do. Each trade, in essence, is an opportunity to add an additional data point but in itself is not significant - only looking at the aggregated results are.
For instance if you held today's trade for only a +0.20 move when it eventually could have been a +0.40 move if you held longer and yesterday's trade you held for a +0.04 move that was the top of the move before it became a loss, you did pretty well both days given your trade entries but for different reasons.
Those trades themselves aren't significant but if you aggregated them and those are the avgs over many trades then you have data to show where adj's need to be made - in the first case your entry spots are good but your problem is you should have held longer and in the second case you need to improve your entry spots to ensure a larger move.
This stats perspective also stops you from dwelling on any particular trade and focus on the L-T view since each trade, in isolation, is just a part of a series of many trades that, when aggregated, gives info about what/how well you are doing. Each trade in itself provides no such info, no need to agonize over a L. Thus each trade is merely an opportunity to gather another data point to be aggregated to assess whether entry spots, hold duration, or whatever needs adjustment.