...is something my husband or I says to the other at some point every day since the spring. At that time, the New York Times added a daily puzzle that I thought was uniquely designed for SLPs and our love of categories as a foundation of semantics. 

Connections is free daily via the web on whatever device, and also now is in the NYT Games app (I do subscribe as I have gotten in the habit of doing at least Sunday to Wednesday's Crossword). They explain it best: 

With Connections be careful of what we call in quizzer parlance "Pavlovs"- you are conditioned to jump at them. It can be tricky as one item may seem to go well with one group but actually a different category can be constructed. 

This can be a great activity for older clients or students as you can encourage forethought- eg let's think of at least two sets of 4 items before submitting any. You can also Provide a growing schema that builds metalinguistics
-Straightforward semantic category
-Figurative language or idioms
-Words that are part of a phrase e.g another word goes before or after them all
-Group that works best if you say it aloud (hint for above)

It can be a good idea to do it yourself on one device and then show it to the client on another, where it is reset, so you know how to cue. There are a variety of daily posts that provide hints, such as Mashable's.

And most importantly...you can also make your own! Think of targeting reviewed vocabulary or concepts! Check out this one I made last Friday when a certain album came out, and click Create to make your own.