The last thing anyone wants to think about is something bad happening while on vacation, but the reality is, it can happen. Being fully prepared is a must, which is why I recommend enrolling in the Smart Traveler Enrollment Program through the U.S. State Department.
I believe Singapore is one of the safest places a solo traveler can visit, but Singapore has very strict laws and rules that a traveler must know before visiting. Pleading ignorance will not keep you from being arrested! Here is my extensive list of "don'ts" for traveling in Singapore.