Visitor Visa - B2

I had my visa interview today (4 sep 2018) at US Consulate in Muscat.
My visa was approved and I really had taken lots of tips from this site actually...I can tell you now with some research from here and there that most of the time candidate knows that his visa will be rejected or approved...

Few tips;
- Fill form yourself or sit next to the person who is filling it for you. So you know everything filled in form. (Interview will be based on that itself) eg. if you are writing i form that you will be travelling alone and in interview you say that, I am going with friends... (change of statement is refusal)
-Don't bother much about funds and other things, you should have approx 4-5K$ in acount which is enough for 15 days trip (in case they ask for documents)
- If your monthly income is less than 15 LPA (or say 20K $)/ anum, you stand very less chance to get visa if you are self sponsoring the trip. Because they see it as a reason that you may try to earn in US.
-If you had mentioned a specif travel plan, you need to mug it up.. or if its intended plan- you should decide in advance that what destinations you will tell to officer.
-BE confident throughout
- Don't give too much information in answers but if you think some Q may lead to doubt, then your answer should be with clarification to clear the doubt in advance..
- Ask yourself again and again what an officer may ask you based on your profile and income to see your ties with residence country and home country..

MY case:
I applied for B1/B2 stating a tourism purpose, I am married and have two kids. But I applied alone. I thought too many times what an officer may ask me.
I have good salary to cover my family expense in Oman and do some saving (But at application time, my salary was not received and I had too low balance).-But I thought already what to say

Interview

VO - Good Morning !!
ME - Good morning

VO- Purpose of visit
ME Holidaying

VO are you going alone (I knew that this Q will come)
ME Yes , since my kids are too young to travel so my wife will stay back in Muscat.
VO oh! so your wife is in Muscat.. (I cleared his doubt in my ans, he might have thought why alone, may be his wife is in India n soo on..)

VO How long you are here in Muscat
ME 7 n half year

VO you know someone in US
Me Yea ( As I enter my relative address as contact person in US in DS 160)

VO please collect your passport on Thursday

My interview was no longer than 30 sec.. but I knew all Qs what he might ask and what I will ans. He didn't cross check any document as I was to the point but elaborated one ans which I was sure coming to me..

SO please if you think your case is not strong, don't take chance and waste money. If your case is strong then prepare well to avoid wastage of money...
If you need some info.. write to me