I have a folder on my desktop called buckets with individual plain text files called:

Blog Topic Bucket Books to Get Bucket Business Todo Bucket Daily Task Bucket Domain Bucket Idea Bucket Link Bucket Music bucket Personal Todo Bucket Quote Bucket Scrap Bucket Travel Bucket

I then add to those buckets with Quicksilver by pressing .[text here] [tab] Append to... [bucket]/name of bucket

It takes a couple of seconds to put anything I want into them, though it probably sounds more complicated than it is written out.