Oh damn, that is now isn't it. I always lose track of the Lunar calendar. And also the Gregorian calendar. Actually come to think of it, it's 50-50 that I know what day of the week it is.
Anyway, I don't observe it personally, but I better bring something to the in-laws this weekend. Normally we construct houses with a room on the top floor for the family shrine -- it's a bit like a balcony, I guess! We use that room for this kind of thing. I see people put things out on the street too.
I think last night I saw someone offering a whole boiled chicken. That's a common one. You eat it after -- so it's very practical :)
Cigarettes and rice wine are pretty common things I see too. Or beer -- you pour a glass and leave it. Then you drink it after too, if you don't mind flat beer that smells like incense :)