During your junior year, obtain at least two, and preferably three letters of recommendation. Register to take the LSAT in June following your junior year or in October of your senior year. Prepare for the LSAT by taking the Lycoming College "LSAT prep course" offered in May or September. Plan a minimum of one month of serious study and LSAT question review as you prepare for the exam.
After you receive the results of the LSAT, you will able to make realistic application plans. I suggest that you apply to at least six schools: two "dream" schools, two where you're certain that you have a solid chance, and two "safety" schools.
Where should I apply?
Check these sites for ideas of where to apply:
You can start your search at this site: http://dir.yahoo.com/government/law/law_schools/
And you can get a pretty good idea of what it will take to get in by checking the Boston Law School Locator.