A.,
Personally, I have found that I can file my own taxes by using a program. I've used both H&R Block's program and TurboTax. I like TurboTax the most. TurboTax has also been advertising something new: if you donated items in 2007, such as clothes, it gives you the amount that you can use for each item (I thought that was pretty neat). I discovered that I could spend about $40 on a program or spend $100+ to a business.
However, filing your own taxes depends on exactly how complicated your situation is. If you own your own business or your husband owns his own business, you might consider going through a company to do your taxes because it gets a little more complicated.
As for write-offs, that also depends on your situation (whether you have a business or work for someone, etc.) When you get a program, it walks you through all of it. The program lets you know whether or not you have enough write-offs to do itemized deductions or to just go with the standard deduction.
Hope that helps!
K.