It's all about doing something mentally and physically active to release energy your body builds up.
"Just try to get out, get some fresh air. If not, if it's too cold, just come to the Dome and walk. It's really nice; something to do," said Lindsay Johnstone.
You can take part in the free walking program at the Superior Dome, Monday through Friday. The PEIF at Northern Michigan University also offers a variety of indoor fitness.
"We offer basketball. During the day you can go to the weight room, the cardio-deck. We have the pool that has different hours. We have drop-in fitness classes as well," said Mackenzie Magel, Student Building Manager, PIEF.
However, if you are looking to do something with the whole family, you can enjoy some outdoor sports indoors at the UP Sportsplex, everything from tennis, soccer, to roller skating.
On Facebook, Kevin Rubbard comments: "Skiing, sledding, ice skating, snowshoeing, snowmobiling, ice fishing, build snow forts with kids, shovel, snow blow, make snow angels, you name it."
"Load up the car and head to Texas," commented Mike Davis.
If you are staying inside, doctors recommend doing something mentally stimulating, like board games. Or gather everyone for some arts and crafts.
However, a feeling more serious, like depression; you may be suffering from Seasonal Affective Disorder.
"Get out there and any type of sunlight, even if it's for half hour a day, it can really help. Another way to cope with Seasonal Affective Disorder is to check with your medical doctor about the prospect of exploring your levels of vitamin D3 cholecalciferol," said Dr. Heather Dermyer, Health Psychology.