First,

That's awesome!
DH and I are close in age to you guys too (37 & 40). It took us seven months to get PG with our DS who is now 5 and desperately wants a sibling!
We expected it to take much longer this time, but it shocked us when it only took 2 cycles! What we did:
I took folic acid, flaxseed oil (that I'm now discontinuing because supposedly it can cause preterm labor), and a multi-vitamin. DH didn't take anything.
We BD just about every single day, not just at O time, but the whole cycle just in case - and on the few days we missed, it was at least every other day.
We BD in the morning around o time, which we rarely do anymore lol.
I also made sure to O (not ovulate lol), but didn't do the hip propping, just tried to not move and go to sleep.
I got PG within 2 cycles of going off the pill and supposedly that can be a contributing factor.
Good luck everyone!!!