CBN (700 Club) will receive used clothing and misc. items. They will also arrange to pick up used items, I understand. I took several bags a couple of weeks ago and they warmly received them. Their office is near the 21st Century Hotel and their number is 6466 9296. The receptionists speak some English also.

I'll tell you what I did with mine and maybe you can get some ideas if you can't find a charity.

I put an ad on this site in the classifieds with a few pictures and descriptions, and got a response of 3 people actually coming to my home to buy a few things (bigger items, and not for much money, but it was something).

As for the rest:
all books in English - gave to a chinese friend who works in an English school to do with as she pleases

decent clothes - gave to the elevator lady I've been friendly with the past year

dumbbells, small tools- to the doorguard I've been friendly with

old tv, good computer speakers, household items, dishes - gave to a chinese friend's sister who just moved into her apartment and barely had anything; she was really happy

older clothes, shoes, food items (not gross; a bottle of cooking wine I used once, unopened or barely opened stuff) - a random chinese guy who lives nearby thankfully took a whole big bag of it all. I apologized that some things were open and that he may want to throw some out but I bet he didn't.

It was sort of like "charity" - I mean most of it went to real human beings who needed it, even though it wasn't a formal charity - it was people from my own backyard.

Even if I'd thrown them in the garbage, the local garbage pickers would've gotten them within the hour. Depending on where you live you could literally leave the stuff on a street and poor people will come out of the woodwork and take it.