I'm probably not qualified to give any advice yet, but just in case it helps, use pencil and paper, if you aren't already. You've probably already heard the "brain = RAM, paper = disk" analogy, but the reason why it even matters to have a "disk" in the first place is that by laying things out in front of you where you can literally see them, it's easier to (1) understand what information you currently have, and (2) draw connections between these pieces of information to find a new piece of information to add to the set (i.e., make an observation).

Also, repeatedly ask yourself questions about anything in the problem that seems interesting or useful for a solution (and answer them). (This guy thinks it's useful for learning in general, too!) You can imagine that by asking yourself a question, you're clearly identifying what you're trying to figure out, and by answering it, you keep yourself focused on figuring that thing out; both of these actions declutter your thinking process.

To improve your skill, you need to be faster at 1) correct observations, and 2) switching to something else if an observation is not fruitful. If a path starts getting complicated, as you do it on paper like the previous comment, you should consider switch, especially for lower rated problems. To train intuition (have correct initiation observations) you can solve easy problems as fast as you can or review missteps in past problems. This might not be great advice, evaluate with what you already know