Have you ever heard that expression “just let go”?
Sometimes it’s helpful, sometimes it’s used like an attack “dude, just freakin’ let it go!”.
How do you “let go”?
Well - the theory and the practice is simple. Letting go is in a way distracting yourself from thinking so much a particular way.
What you focus on, grows - this is the golden rule. Hence the wise man who said "what you sow is what you reap". 
But whatever you sow, put it in the ground cos that's going to get heavy at some stage. And I personally wouldn't garden in a suit, but up to you.
So in meditation you use the breath (for example) to focus on. In the Ishayas’ Ascension we have Ascension Attitudes which work very nicely indeed. Since what you focus on grows, putting your attention on something else means THAT grows in your attention. You let go by putting your attention on something else.
Simple so far, right?
So what is happening when you try to let go and it keeps on coming back, time and time again? What do you do when it’s strong, and intense, and habitual?
Well - those thoughts patterns ARE habits, so they WILL come up time and time again. They are a well worn groove of thinking that is easy for your mind to unconsciously slip into. You try and let them go and there they are again.
So what is important for you is consistency in letting go, time and time again - like the tennis professional player practicing their shot, time and time again to make it perfect - all so you can finally come to let them be ...
If that makes sense?
Consistency of letting go is key simply because you have focused on thinking a particular way for so long or given it significant mental and emotional weight that it now has the momentum of a runaway train.
Practice makes perfect, and makes peace too. So don’t get discouraged when you find 
yourself in the same patterns of worry or doubt or anger or whatever … Imagine cosmic Yoda is talking the words on the left to you and be that tennis professional and just get back on the (tennis) horse once again.
You’ll get so good at it, you’ll become unconsciously excellent at it. It will seem like you do it without any attention, automatically. And how wonderful is that? How wonderful would your life be with that kind of mental and emotional resilience?
Amazing is what!
So - go well! Arjuna
PS. If you’re interested, this is exactly one of things I teach here, along with the very cool tools and the practice to allow you to do that, to let go sweetly and easily: