1) Most of the personal statement prompts are similar (i.e. Give us information that hasn't been included somewhere else in your application to help with the admissions decision. You can talk about accomplishments, obstacles overcome, goals, etc.) For the most part, you can use the same PS and just tailor a section of it for whichever law school you are sending it to.
2) If you complete the 'Common Information' form on the LSAC site, it will speed up your application completion time ALOT!!! It asks for the standard information that every application asks for, and then when you open up a particular school's app, it will auto-complete that information. Each application takes me about 5-10 minutes because of it. But make sure to look over the info that was automatically entered, because some schools ask for a different format. (i.e. Some applications ask you to list jobs/schools attended in chronological order, whereas some ask you to list in reverse chronological....You don't want to appear as if you can't follow directions!)
Hope this helps!!!