When college teaches you how to write an essay, you learn this structure: #) Tell them what you're going to tell them.
#) Tell them.
#) Tell them what you told them.
Or, simply stated, say your point three times to really drive it home. Don't be afraid to be persistent; that's when people remember what you said.
Don't be afraid to say it again. It makes it memorable.
Repeat your main point. It will be annoyingly unforgettable.