Excel 2007

I need some basic help. I am not vey comfortable with these sheets. I will state my requirement.

I am working a network support executive in Second line of support. I receive calls (emails) from clients in UK. To track the data of calls I attend to I am creating a excel sheet to record my call volume. The sheet basically contains columns I update, I have stated the ones I need help with:

1. Sl. No. [NUM: I need this to increment automatically, i.e., when I place the cursor there I need the next number to come up.]

2. Assigned On. [ DATE: I need this to increment automatically when the first column comes up]

Other fields are:

Call No, Moved, Closed, and Issue: These I update dynamically and because of that I don?t need any automation.

It would be much helpful if you could give me the options I need to click so that i get the relavant things done.

I use Office 2007, though, if you have options in 2003/xp I will find out the corresponding ones in 2007.

Hope someone helps .
Cheers

Ramu