A common sign that a blizzard is on it's way is snow drifts that are piling up and winds that are very strong during the snow drifts.
Other warning signs that a blizzard is coming is low to zero visibility when it's snowing, blinding snow and really freezing bad wind chills.
If a blizzard is coming near your place you should not go out and venture out on the roads and try to drive in it.
Watch the weather closely and if there's a blizzard forecast to be in your area soon then stay at home and don't venture out in it.