Before setting your heart on law, be aware you can major in just about anything and become an attorney. You will need top GPA and good LSAT scores. If you think you’re really interested in law, try getting a job at a law firm or prosecutor or public defender. You could be a messenger and copier for them — they still frequently prepare very long documents, last I heard. Ask a friendly attorney if you can shadow him or her. It may be much more boring than you imagine.
Good research and writing skills are very useful. Logic is also very important. Good public speaking and interpersonal skills are also useful.