What were you thinking?!

I think you should try to be with/ in your body. Try to focus on what you are feeling. The sensations and emotions that come from it.
Thinking sexy thoughts can help but try not to force anything too much. If it comes fine; if it doesn't that's also fine. Thinking nothing can also work but I feel that's too much of an effort and it takes a lot of concentration that could be spent on feeling something.

Think of it like Chinese water torture. Where a drop of water isn't normally a thing you would describe as intense or maybe it won't even register. But your body will get more and more sensitive to it the longer it goes on and the more you focus on it.

Great advice, thank you!

My best results so far, in these early days, have come from 'set it and forget it'. Do the meditative breathing, some contractions and then let your mind wander. Whatever it wants to think about. I've yet to fall asleep but I'm pretty relaxed when things start happening. The other times have been after I've cleaned everything up and put stuff away. It's like, on one level, you've decided you're done, but on another, deeper level, your mind is now freed from your expectations and goals that you've subconsciously set. It's not like going to the gym regularly and deciding ahead of time that today you're going to add another 20 pounds. The mindset should be, 'I'm going to have a session and whatever happens, happens. And if nothing happens, that's fine too.

I don’t actively think anymore,trying to create a erotic scene in my head,just ends up chasing feelings away,and porn is more distraction than help.I just let whatever thoughts come. Sometimes some random weird thoughts pass like a tray of muffins :D.
Or maybe a pair of breasts,jacking off,or even nice female legs in black ripped jeans,anything really,though as I become more aroused,erotic thoughts come more and more. My best super-o was preceded by thoughts of me playing with myself while my wife was riding another guy,that spike tipped me over the edge.

Lol! Last week I was thinking about a building project when I had some strong sensations!