Progressing from one workout to the next is what we all strive for in the gym, however, some stick to what's more comfortable, such as always doing the same reps/sets or constantly using the same weight. The latter conflicts with one of the major training principles (the principle of progressive overload) and will actually stall your progress.
The progressive overload principle states that in order to make progress, (bigger muscles, more strength or a more efficient energy system) your body and muscles need to be continually challenged with new training stimuli or else they'll cease to adapt.
Get comfortable with the uncomfortable—pushin’ more weight, completing more reps, doing an exercise faster, etc. Once that becomes comfortable, get uncomfortable again. This is what training is all about—continuous progression and improvement.
Incorporate the following progression methods to ensure you're always advancing toward your health and fitness goals.