Though many believe a family or employment petition are the only two options available to lawfully reside or temporarily stay in the U.S. there are definitely other possible options without having to rely upon these.
Some of the common visa options allowing you to move to the U.S. on your own include a student visa, a visitor visa, an investor visa, and the diversity visa program. Some of these options can also potentially result in permanent residence, also known as the issuance of a “green card” if certain requirements are met.
For example, if you are an foreign investor and take part in the EB-5 program, after making the necessary investment in a commercial enterprise in the United States you can be issued a green card. After maintaining your green card for five years, you are eligible to apply for U.S. citizenship.
Individual Immigration Details
What is a Non-immigrant Visa?
How do I get a visitor or tourist visa?