Advertising the next show at the end of a previous one, before it has actually finished. American TV is famous for this, but we do it too. It drives me insane because in the case of drama and comedy it alerts you to the fact that time is nearly up and makes you realise things are now going to wrap up which completely pulls you out of the story. Doctor Who famously did this a few years ago during a very intense conclusion with what was supposed to be an out-of-nowhere cliffhanger. Unfortunately the BBC decided to alert us to the fact that Any Dream Will Do was about to start by having a cartoon Graham Norton dance across the bottom of the screen. I believe there were widespread complaints about that.
Re-caps in the middle of something, showing us what we've literally just seen. Gameshows do this a lot - "earlier in the show, Julie lost £100" etc... - and Pointless ridiculously recaps the scores by reading them out from a giant screen despite the fact that contestants constantly have their score in front of them on big screens. This also goes for double-bills of dramas. Why do we need a recap of the first episode? We've literally just seen it.
Here's a more serious one - the need of daytime TV or other lifestyle shows to trivialise serious issues in order to "keep it light". This Morning does this so much that when it's an issue that relates to yourself it can get quite offensive. I suffer from depression and once they did an item on it, read out a few genuine comments from viewers who suffer from it and then finished with some guy saying "I get depressed when I see my kids' Christmas lists LOL!" or something equally crass and insensitive, and everyone had a good laugh. It's inappropriate but the show feels uncomfortable without it, so it shouldn't tackle serious issues at all if it wants to keep things light. This is standard practice for This Morning, and The One Show, Loose Women and breakfast shows are all guilty of "making light" of things as well.