Where to invest surplus amount when I already have a lot of Fixed Deposits ?

Hi,

I have surplus funds sitting in savings accounts. Where will it be best to put that into – an FD or debt or equity fund? I already have significant number of FDs. If I go for SIP route to invest in equity. It will take much longer to invest. Pls suggest how and where to invest this money? I fall into 30% tax bracket.

Upender