I keep returning to "letting go." It seems to me that it is the heart of practice rather than "emphasizing." But I'm a relatively new Buddhist so take my observations with a grain of salt.
If meditation has gotten slack, or become more rare, I look for the causes. Glorifying the dukkha would be missing the point, IMHO. For me, I'd see it as dealing with the symptom instead of the illness. So I'd begin to investigate. What are my actions? What do I choose to do instead of meditate? What causes appear that result in me not meditating.
Time and again, I find that there is something to let go of. For example, I found that I'd rather check email and postings than meditate
How do I know this, because it was frequently where I ended up - in front of the computer instead of on the cushion. There were causes for that decision, too, and eventually I could see them at work and begin letting go.
It was by letting go of some of those decisions that I made some headway. I would not pour that cup of coffee until after meditation (it was a major temptation to take that cup and sit down at the computer). I can let go of that habit each day.
In my college days (long ago), threatening myself with poor grades, etc., didn't do anything to motivate me. I had to look for the causes of my decisions, then let go of what wan't working for me.
But we're all different and it might work for you. If it doesn't, let it go
Use a different approach. I'm not good at this, just making some headway with it.
Please remember that I have nothing to teach. I'm pretty new to Buddhism.