Don't tease an element more than twice. Don't over sell, or over promise. If you have an amazing idea for the weekend, make sure it's truly amazing. Make it fun. Use riddles or puzzles or trivia questions to put new spins on old information.
People love it when a tease becomes a game.
You can seduce your audience into hanging in through stopsets and you can encourage more listening occasions by promoting compelling reasons to tune in. You must use your own air to market to your P2 and P3 listeners or you will bleed audience imperceptibly until you find yourself in TSL oblivion. Preparation is key to a successful tease. Make sure you know exactly how to frame the tease before you execute it and make sure you know everything your going to sell before you go on the air. Programmers, make sure the information is available in a manner that is easily manipulated into a tease so your air talent doesn't use the same tease every time.