I like to use strega in drinks that call for Chartreusse, (especially yellow).  One drink that i like a lot, (i call it La Chavista) is:Strega, Santa Teresa Solera rum, orange bitters and burn orange peel.  another great drink with Strega in it is: Strega, orgeat syrup (homemade, not the commercial crap) orange juice, lime juice and white rum, it is delicious.