If you create multipul bookmarks from a station towards its moon then warp to the bookmark closest to the moon at 100km you are able to effectivly hide behind the moon preventing people from using a micro warp drive (mwd) to approach you. Also it allows you to be on grid to be an effective spy in important combat situations. (the planet bumps people upto 10,000 km/s when they warp into it too).
Bumper cans, If you place a secure can outside the station undock point this will bump all who jump out, this is handy to pickup the frigs that undock as they cannot scoop the bigger secure cans.