I think parents are the key. And children should trust their parents. The children should doven to Hashem that in the merit of trusting their parents that when they accept the shidduch it will be a good thing and the parents should doven that Hashem will give them sechel to pick a good partner for their child.
Pick a partner that your parent will get along with. Doven to Hashem that the person will say yes. In our circles we have to “Just Say Yes”.
It was a true miracle that I met my spouse. I had to be married and I didn’t know it and so Hashem made it happen. For the ones who know they have to get married they should “Just Say Yes” (and remember to doven for the person on the other side to say yes).