'Practice doesn’t make perfect. Perfect practice makes perfect' - Vince Lombardi NFL Coach
I see many people putting the hours in but only a few of them getting anywhere. You can't just repeat the same old routines that are not working and expect any change . . .
'The definition of insanity is doing the same thing over and over again, but expecting different results' - Someone
Engage your mind with your training like you would any other important activity. From the start of the set until the last rep maintain quality reps for quality results. If you don't know what optimum technique looks like seek advice.
If you struggle mechanically to perform correct technique then more ours repeating the same old crappy for isn't going to fix it. Prioritize some time working on mobility/flexibility.
Effective exercise does not simply mean move until you are tired. Train with purpose and achieve some actual results!