When running a team, you may want to have extemp debates with random resolutions, to help your students learn to quickly form arguments and think on their feet. (With such impromptu debates, I recommend using no evidence and half speech/cross times.) As an individual, you can use these resolutions to practice on-the-fly argument generation, or for the aforementioned impromptu debates. Here's a list of resolutions you can use, sorted by type.
Policy action (US)
Policy action (general/other)
Value judgement
Prioritize
Sources for many of the resolutions: