I got my US tourist visa 2 years back

Basically just follow what the website require to the teeth.

i got my employment letter, bank statement, utility bills, car grant etc

do not book flight tickets as that is not a guarantee that you will get.

on the day of interview, just answer all truthfully but that depends on the officer in charge. luckily for me they only ask like 1-2 questions.

the lady besides me wasnt too lucky as i overheard and they had to convince the officer that they're coming back until the showed the utility bills under her name and that even took some convincing to the officers