What are some good ways to invest in realestate?

The few that I am familiar with is:

- buying a home and renting it out

-Buying land cheap, having a house build there cheap(if possible) and selling

-And something dealing with property tax, which I want someone to explain to me what that is and how I go about that.

I am new to it, but very much interested in the various ways to invest.

V.