>I finally converted a 5.0 application to 8.0. Most of the energy went to solving migration problems (still working on it), so didn't have time to have a look to the new 8.0 features.
>
>Not knowing very well where to start, what are the top 3 features I MUST have to look at in 8.0 ?

You should read the What's New section in the manual.
I do not know why did you migrate to VFP8 instead of the current VFP9 which has sooo much more.

I would say that my choices for excellent new stuff in VFP8 would be:

Try..Catch
XMLAdapter
XMLUPDATEGRAM() improvements
BINDEVENT()
AutoInc field type
Empty Class
Collection class
CursorAdapter
Exception Class