I don't know how to start my personal statement for law school?

I know, I know.. Only I can answer this question. However, it's difficult because I've led a pretty normal life without any unusual or interesting cirstances that led me to pursue law school, and I know that law schools like their applicants to have something particular happen to them that induced them into becoming a lawyer. For example, someone may have grew up on a farm and thus established an interest in agricultural law? Thanks in advance