I'm part way through several episodes of my show. What tends to happen is there is one scene that I'm just not feeling and so the whole episode grinds to a halt. I don't think there's anything wrong with sitting on an episode for a few weeks waiting for a bit of fresh inspiration to gracefully arrive but when the weeks turn to months I start to think that I should do something a bit drastic to shake things up. In all instances, these scenes are vital to the overall plot and so cannot be dropped*. What tends to happen is that it's quite a mundane premise - going to a shop to buy something, meeting with a supplier to order products etc. I find it difficult to think of comedic potential in these kind of scenes, especially when there is a going to be a minor character there.
Now I know the sarky answer to this question is "Oh, what you're trying to do there is called 'writing'. You need to be better at the writing." But I can't help thinking that other sitcom writers must go through this and may have picked up some handy techniques for getting through the script doldrums.
For instance, with one scene I'm tempted to just turn 99% of it into an irrelevant conversation. Basically thumbing my nose at the exigencies of plot and dropping ice cubes down the etc etc.
Any ideas?
*I'm aware of the trick of having a scene take place "off camera". I learned that from studio sitcoms like Friends. If a scene is going to be too complicated or not funny, just don't film it. Instead, have the characters sit around talking about it afterwards and making fun of each other - and watch out for snark from that Chandler! However, even that has its limits.