For a few years now the Dhamma has been a going concern for me in life, and I do think I've learned a lot from meditation and contemplation dependant upon the Buddha's teaching. However, there was one thing that I had not accomplished: I had not made peace with meditation.
As Ben said above:
My recommendation is to put aside any thoughts of making progress, of becoming proficient or this or that experience or attainment. Just maintain your focus exclusively on the object of awareness for as long as possible at a time. And whatever happens, try your best to maintain that unbroken focus.
This doesn't seem glamorous, but it is an attitude that will make meditation doable each day, which is critical, because meditation is something that will yield results only when done day in and day out.
If you instead take the view that you must be proficient, that you must be free of hindrances each time you sit, that your practice must always be growing and never experience decline, then you will eventually burn out. Then you'll either never resume, or resume in the very state you were previously straining so hard to overcome in the first place.
So, make peace with the fact that meditation is a complex and conditioned thing born from a complex and conditioned mind. Being so complex, it is cannot be quickly made over into what you would wish it to be, and so patience and consistent effort over time is critical.
Now, with that said, I think it is helpful to point out that samatha and vipassana are not really separate. When spoken about they may seem that way, but actually it is impossible to sooth the mind and keep it alert and energetic without coming to an understanding of its nature. When things seem to be pleasant, then you can see how that came to be -- and in time you see how it falls apart. Often, you see yourself get agitated when it falls apart, and so learn both what it is to suffer on that occasion, and how it came to be.
At other times, when meditation seems unpleasant, we see that the mind tries to run. When the hindrances bother us, we see how persistent effort chases them off sometimes, and sometimes not. At other times they fade, only to return. Perhaps we see that the mind becomes still when the body is relaxed. Or we see that the body is energized when we find something about our breathing which catches our interest.
And so on.
See, and those are just my common reflections born out of a haphazard and short practice. Imagine how long winded I'll be in twenty years!
Anyway, I burnt myself out about six months or so ago and had trouble resuming a constant practice. I've been posting about it in the Mediationa Challenge thread. Many of my posts might seem familiar to you, so perhaps you'll find them helpful for no other reason than to know that yours difficulties are common to others.viewtopic.php?f=17&t=2647&start=240#p179283