I just have a couple easy suggestions.
Make sure you don't take cold/sinus/allergy medicine. It can dry up your CM making it harder to get PG. I used to take Advil Cold and Sinus A LOT until I read how it can stop you from getting PG.
Drink enough water. So you have enough CM to move the sperm
Try BDing every other day.... it's worth a shot.
Consider plain old Robitussin.... it is said to increase CM.
I also take Vitamin E. I am not sure why it is supposed to help...but I figure it can't hurt.
That's about all I have. I hope other come up with some good ideas too.... cause I am open to suggestions too!