One of the most helpful meditation instructions I've ever encountered was from Ken McLeod, in his book Wake Up to Your Life.
The essence of meditation, he wrote, is to "Return to what's already there, and rest." When I'm able to remember and apply this instruction, it clarifies a lot of potential confusion.
First, learning to distinguish between what's already there and my ten thousand ways of commenting on it, adding something to it, subtracting something from it, or just drifting away to somewhere else.
And then the constant practice of returning to that — surrendering freshly each time to what's already there without subjecting it to any of my agendas.
And finally resting in that simplicity — letting go of efforts to achieve something, settling into layers of stillness and silence that lie somewhere beneath conceptual mind's humming machinery.
Like a lot of great meditation advice, this line might sound simplistic when you first hear it, but when you begin to unpack it and apply it in your own experience, it's surprisingly profound.