Hi Ginny
If you are getting your keys on the 16th July, the first thing is to go 2nd Level and get your insurance done, this way you do not need to run up and down. Next is to go to first floor counter, pray you get served by aunties who are extremely fast and experience.... (Maybe 30mins~45mins), there is alot of documentations to be signed, especially you are getting loan from HDB and getting your CPF wipe out. Then go to 2nd floor again to get your electricity and water activated (Your contractors will need it anyway - 10 mins). Then you are good to go and open the door. Just be there 5~10 mins before the appointment, they are pretty punctual.
Hi XuanTing
When you see your collection status is ready online, just prepared your personal documents first. Your letter will come in 2~3 days time.