What to do with cacti/succulents during winter?

Some of them will do grand in the front porch once they don't get frost or they're dry enough that they don't get mould. A lot of cacti come from places that are dry but cold, so they won't do too badly. Many do grand outdoors once there's not a protracted cold snap. That said, it depends on the cactus/succulent in question as to how cold hardy it is. I've had succulents in garden quarantine over winter (some for a number of years) and they just grew a bit slower, still flowered etc.