Background stamps are so useful and versatile, but how often do you just pull them out to use as a "background"?
Why not make a feature of them occasionally?
Here's 5 different cards I've made using En Francais. Order it here.
Note: Working with vellum and acetate is tricky when it comes to glue. You can either buy some vellum glue dots - they're quite good, but I don't think you ever get a truly invisible fix. Or you can choose to add adhesive only in places where you know it will be covered by embellishments - this can be hard to work out at the start because you almost have to design the project backwards.
Anyway, I hope this may give you some ideas for expanding your use of background stamps and hopefully you'll find even more ways to use them once you start playing.