H1B, H4 Visa

My wife and I we're both applying for H1b visa to same company.
Applied in Chisinau, Moldova

Interview appointment was to 08:30am, so we cam at 08:00 and started waiting in a line.
At 8:30 the door opened and the man asked "who's for 8:30" ?
They started to invite people inside by two.

When we got invited, we passed the metal detector gates (my belt rang)
They asked to turn mobile phones off and put them on the shelves.
I had no mobile phone with me. My car keys raised no questions at all.

Went inside, passed our documents to the window.
- sorry, you paid wrong amount!
- O_o ? how? 1920 lei is $190 in USD
- no, our exchange rate is different, you should add more to 2280 lei!
- where?
- find a bank anywhere nearby, and come back till 11am
- O_o, ok

We rushed to the bank, bank is closed, opens at 9:00am only
Waited 20 minutes for the bank to open, and paid missing amount.

Second try.
Went inside, it was 9:30am, passed our documents, this time they were ok.
I had the bottom part of I-797 Notice of Action, and they asked why don't I have the whole document?
I answered that it's written on the document itself - to send the worker only the bottom part and keep the rest.
It worked, and we sat to wait

Like in 20 minutes our names were called and we were invited to window#2, together, my wife and I.
So we had a double interview, both at once, though my wife is a separate H1b
VO was a pretty korean girl, speaking English very clear and easy to understand

VO: Hello!
ME: Good mooorning (smile)!
VO: How are you?
ME: Fine, thank you!
VO: So, you are going to work in America!?
ME: Yes, exactly :)
VO: You're going to work in company YYYY ?
ME: Yes
VO: Tell me about the company, what does it do?
ME: blah blah blah
VO: Ok, tell me what is your education background?
ME: B.S. in Informatics
VO: Where graduated?
ME: University ZZZ
VO: Year?
ME: 2004
VO: And you (to my wife)?
Wife: same university
VO: Same year?
Wife: Yeah :)
VO: And what you did all this years, after graduation?
ME: blah blah blah, worked, blah blah
VO: and you?
Wife: blah blah worked too blah
VO: when you got married?
ME: at mm.yy
VO: oh, no so far ago..
ME: yes (smile)
VO: Can you pass me your diplomas?
ME: We have diplomas and evaluations
VO: both please
ME: here
VO: thank you
VO: so where are you going to go? The location?
ME: city, state
VO: is the company headquaters located there?
ME: yes, exactly
VO: where are you going to live there? got any house?
ME: we're going to rent an apartment
VO: do you know what your salaries will be?
ME: $xx.xxx
VO: Very good.
VO: Can you pass me your petitions letters?
ME: I have a petition support letter, and a job offer letter
VO: can I see both?
ME: sure
VO: passed through all documents for 30 seconds
VO: I am glad to tell you I am going to approve your visas!
ME: Thank you very much!
VO: You can come tomorrow at 4pm to get your passports.
VO: Here have your diplomas back, but I will keep your letters, you may have them back tomorrow.
ME: Thanks alot! Good bye!

I liked the interview alot, and got very excited
The key is to smile, to be confident, to look directly in the eyes
Don't worry if you forget some info or some English words, they're helpful and easy to talk with