Like everyone else has said—study and practice with a book or course or whatever. Then, if you live in a large city, find the area that the language you are learning is spoken in and go eat there. If you don’t, but there is a college see if they have a club for sitting around and chatting in the language.
For example: I live in Chicago. I love Czech. While I haven’t gone there, some research has indicated I can head to a certain part of town and meet some Czechs and speak Czech at this little cafe. If that doesn’t work, one of the local Universities does have a Czech speaking group that meets up at cafes near campus.
Czech is kind of an out there one, it should be easier with French or Italian. I know my campus had groups for both and was fine with non-students attending club meetings.