Tips on getting pregnant

My boyfriend and I have been together for about 2 years. For well over a year now we have literally taken zero preventative measures (if ya know what I mean…)

I have a 5 year old son and he has a 3 year old daughter sooooo obviously both of our “parts” work lol.

It’s kind of crazy to us that it hasn’t happened yet. We have never actively tried , as in sat there and counted my ovulation days and stuff like that. We were both just “if it happens it happens” … but now we are both kind of wanting it and talking about it. Are there any tips/tricks that I’m unaware of ???