I do the pendulum test. The way I always heard it was across the wrist/circle for girl, along the arm for boy. I think...
It was DEAD ON accurate for kids 1-4.
By the time I got to PG #6 it KILLED my arm to hang on to the thread through babies 1-5 to get the gender for #6 LOL!
I have found my intuition and DH's to be very accurate.
I was SURE #6 was a girl, and yep, sure enough.
I had dreams about baby girls. A couple about baby boys, but those were about baby #5 who died at birth, and most of those were sad/scary.
With DS (#4) I knew he was a boy. I didn't want to "know" by U/S, but I *knew* in my heart. I even knew he was JUST LIKE DH.
I did have a couple "girl" dreams, but the most vivid dreams were all boy dreams. We could also not decide on a girl name we liked. We went around and around trying, but nothing "felt right" well duh, a girl's name is never going to "feel right" for a boy baby!
With #5, I thought he was a girl. I had a couple very weird dreams about baby boys, and looking back elements from those dreams came true (sitting in a very formal/solemn gathering, baby was a boy, but he was a "funny color" and I had no clothes for him so one of the old ladies there gave me a black sheer scarf to wrap him in... if that doesn't say "funeral home visitation" I don't know what does!) I never had dreams about life with a baby boy, and anytime I tried to picture holding/carrying a baby boy my mind didn't really "process" it, weird I know, but there it is.
With #6 I dreamed a vivid birth dream about birthing a baby girl with tons of dark hair. DD was born with a head FULL of very dark hair...
When using dreams as a gender guess, take the most vivid/realistic of the dreams, and count the number of dreams you have. Give the most weight to realism, but also consider the number of dreams. If you are having more boy dreams, then it's probably a boy.
Ask preschoolers, ages 3-4. They have an uncanny accuracy in guessing baby gender, especially if the mom is related to them, or a very close friend they see often.