This is probably fairly straightforward, but I wasn't able to find it right away. I'd like for Mathematica to display on startup the latest notebook I was working on, and nothing else. No additional old notebooks and no new blank notebook. There is probably an option hiding somewhere to do that, but I wasn't able to find it. Apologies if this is too simple.
R.M beat me but I'll post this anyway for variety.
You can open the last Notebook with:
Methods for preventing the opening of a blank Notebook, for both version 7 and 8 are here:
The list of recently opened notebooks (as shown in
Some additional related questions that might of interest are: