Use this phrase, "(do) something (adjective)" to mean "something that is (adjective)":

I'm in the mood for something light.

I want to do something meaningful with my life.

You can use "anything" in the same way:

Don't buy anything expensive.

You can also add "a little more" or "a little ___er" to compare two things:

I'm looking for something a little cheaper.

These are good ideas, but let's try to think of something a little more creative.