I agree, it really is good to try and figure out what you ate. You might be really off with your guess, but at least you tried to figure it out.
If you have the latest WW getting started book, they have that section on portion sizes. From there you can get a ballpark guess of wether or not you had a cup of something or a half cup or just an ounce. DWLZ is a great suggestion for dining out, but that getting started book has a lot of suggestions for point values as well. Also, another thing to think of is that everything was probably cooked with some kind of fat, unless of course you had things grilled or steamed - so don't forget to add a few points for oil or butter.
Try looking up similar things, or breaking down the foods to their basics - Pork tenderloin, forget the sauces and extras, just estimate how much you had. Spanish blue cheese - well blue cheese is pretty much the same wherever you go, its a semi soft cheese. Artichoke fritters, try potatoe pancakes? Artichokes aren't all too many points (1pt for 1 cup), add a few points for what you think the binder was, and for any sauces.
I have tried WW in the past and have failed because I didn't even try to figure out my points for things. Write everything down - even if you had 100pts one day, also write what was going on, a birthday, bad day at work, new job offer..all these things are good to reflect on.
Good luck!