Nraf86

I mailed my packet on Dec 27th, received notice of receipt on Jan 4th and got NOA today in the mail. 
 
I need to travel overseas for an urgent matter and I am wondering how far is Biometrics appointment timed from NOA letter? If it's too close then I can wait for it before travelling. 

If you are currently living in California and want to settle there, I think you should send it here, see attached pic. Also I will recommend you to add new address on both of your DLs because at interview they asked us to show ours.
We used credit card. The best way people say is check(be sure you have enough on your account). 
I did two hole on each page at the top and used fasteners as USCIS webpage advised. And just two solid thick covers.

1) It should be on your I-797 Green Card approval letter
2) USCIS address info here - note that it depends on what state you are in, and that there are different addresses depending on if you're using USPS or a courier (FedEx/UPS)
3) Info on how to pay filing fees is here