Getting a US tourist visa for my darling was a little challenging. The online form kept timing out. Here's a helpful hint - make the answer to your security question very short and easy to type - you'll have to do it at least 20 times before getting the whole form filled out.
She went to the interview with a ton of documentation - including our marriage certificates and my passport - proof of ownership.
interviewer glanced at her employment contract and one or two other items, asked a few questions. When we met, when we were married, what her job was, and then passed her. I'd say being over-prepared helps.
Here's a helpful list of things not to have your wife/fiancee say:
I met him at a bar 2 months ago, got married to him one month ago, and I want to get to America before the baby is born.
He'll be my 4th foreign husband. The last 3 couldn't get me a visa.
I met many foreigners working at that pink hair saloon, but he was the first one who agreed to marry me.
How long until I can divorce him and keep my greencard?
Once I have a greencard, how hard will it be to bring over my parents, siblings, and cousins?
Do I really have to have sex with him for the marriage to be legal enough to get me a visa?