The first and most important thing is i try as much as possible to sit with discomfort. A classic example of what happens to me is that i start trying to narrow down what the key product feature should be for this product. And beyond just sitting in the discomfort, there are two other things that i do as I hit these sticking points. That could be going for a walk, a drive, or literally just changing rooms. But i often find that change of environment will help spark a break through and push through that block.