Feedback period is invaluable. A mirror can give you feedback, a focus mitt/hitting bag can give you you feedback, a sparring partner/trainer can give you feedback. What I'm getting it is that sometimes you're so caught up in what you're doing that you can't appreciate how you are doing it. It's hard to notice. The problem with trainers in all sports is that many of them can tell you in detail what you are doing right or wrong but they can't make you experience what it is to do it right. On the other hand a trainer can point you in the right direction so that you can experience it for yourself.

I think in you are making a mistake and you want to correct it, you don't just take it in mind because that alone isn't enough to make a difference. Look at yourself in the mirror throw some of your techniques and take in what it feels like to do it right. There you can experience it and with that feeling it will have a bigger impact on how you execute any movement more than just the thoughts alone.

Sparring is real test, you've felt the moves you know the counters and techniques by heart, now you can sharpen your powers of observation and timing of those moves. All the moves that you can bring to the table you have to experience it in training and perfect it in sparring.