Some more queries

i herewith list out some sentences in which i have marked out the doubts..... i request you to help me with these sentences...

*there was a knock at my neighbor’s door in the midnight.- what would be the better alternative for this preposition in this place?

*then you must keep two things in mind/then you must keep in mind two things- which one would be better?

*working in an MNC in Chicago/working with a MNC in chicago- which one is correct?

*I could not deny my boss’s order -in this sentence, is my usage "boss's" order correct?

* The thing which made me worry about my boss’s order-same doubt as in the above sentence.

*All we have to do is to visit such a site, give them the main theme or goal of the organization or whatever for which we want the logo and make the payment and there we go! A fantastic logo in our hands, within an eye blink-i guess this one is right but i would like to know if there is any other standard alternative.

*I started searching for any instant wedding card delivering shops in the web-is it the right preposition?

*it is my interest which made me choose this work as my career-is there a necessity of using the word 'to' in between 'made' and 'me'?

i will be very obliged if you give me the reasons also