Here are some of mine...
Hit Mix (Singles & Compilations)
[Media Type]=[Audio] playlistid==50142158,=194405892 ~limit=-1,3,[Artist] [Rating]=>=3 ~sort=[Random]
The two playlists here collect anything that has been designated as a single or artist compilation (greatest hits, best of, etc.) I assign keywords to these.
Back in the Day (30 songs)
playlistid==986122414 ~mix=30,10,[Date (year)]=1970-1979,10,[Date (year)]=1980-1989,10,[Date (year)]=1990-1999
Pulls from the "Hit Mix" playlist above, then limits to 10 songs each from the 70s, 80s, and 90s.
Random Live Album
[Rating]=>=1 [Keywords]=[Live] ~n=1 ~a [Complete Album]=1
All Songs by an Artist I Like
[Media Type]=[Audio] [Rating]=>=3 ~limit=1,-1,[Artist] -[Genre]=[Christmas] ~sort=[Random] ~nodup=[Artist],[Name]
Instrumental Hour
c=instrumental OR [Keywords]=[Instrumental] OR [Album]=[instrumental] OR [Genre]=[instrumental] OR [Lyrics]=[instrumental] ~sort=[Random] ~t=60
Forgotten Favorites (2 hrs.)
[media type]=[audio] [Last Played]=>=180d [rating]=4,5 ~sort=[Random] ~t=120
20 New Songs
[Media Type]=[Audio] [Date Imported]=<=90d [Number Plays]=<4 [Rating]=>2 -[Genre]=[Christmas],[Comedy],[Other] ~sort=[Last Played] ~limit=-1,2,[Artist] ~n=20 ~sort=[Random]
Decades:
50 (insert decade) Favorites
[Date (year)]=1980-1990 ~mix=50,40%,[Rating]=3,30%,[Rating]=4,30%,[Rating]=5 ~nodup=[Artist],[Name] ~sort=[Random]
(Insert Decade) Hits
playlistid==986122414 [Date (year)]=1980-1989 ~sort=[Random]
Pulls from Hit Mix playlist
Random (Decade) Album
[Media Type]=[Audio] [Date (year)]=1990-1999 ~n=1 ~a [Complete Album]=1