I have only had one short lived LD and in it i managed to stop time as part of a reality check (this was before i knew about LDing and what got me into it).

during my research i have found that one way to keep lucidity is to know what you want to do in your next lucid dream, so seeing as you can be in complete control you can have some pretty awsome fun..

Thought it would be interesting to get some feed back on your LD intension for when you next become lucid maybe get some really cool ideas going!

here are some of mine,
visit an abandoned world (like in "i am legend")
stop/slow time (and explore it this time)
cant think of anything else atm but thats where you come in