I've lost both my parents. It's tough for everyone who goes through it. So I'm not sure what you mean by "deal with it" Do you mean not suffer the grief and loss? That it not be a painful and emotional time? I have no advice for that.
Perhaps grief is something we "deal" with, but in my experience, it's something we have to go through, and there are no short cuts.
You might do a search online. Lots of topics on grief, loss, and managing it.
Again, sorry for your loss.