SSEiYah,
How far is your commute and what are the roads like? Do you need to change your clothes upon arrival at work? Will your commute take place in dark, snow or fog?
I absolutely agree with the precious posts. And, run your current bike up to your local LBS (local bike store) for a tune up to make sure it's in good shape. Also, do you have tools, a spare tube and patches in case you get a flat (and maybe a headlamp if it's dark)?