Don't forget the various cleanup categories -- tags like {{wikify}} and
{{notability}} don't lead to immediate deletion, but will eventually draw
the attention of experienced editors who may decide to nominate a given
article for deletion.
When I nom things for deletion, it's usually in the course of my "normal
duties" -- I'll find them cleaning up after vandals, while trying to sort
categories, or clean up articles in general. Things like that.
And there is always [[Special:Random]], but I try to stay away from using
that too often.
-Luna