There are countless front seat POVs available on the internet for pretty much any coaster you want to "ride". While it's not the real thing, it's about as close as you can get, especially if you're like me and you live in a climate that shuts coasters down in the winter.
At home, I have a stack of trip countdowns, which are made from index cards with the logo of the park or ride I will be visiting drawn on it. They serve a purpose to get me excited for an upcoming trip, a new coaster debut, or the opening of your home park in the spring. Go ahead, make one. After you're done, "laminate" the card by covering it with see-through packing tape and use a marker to write the number of days remaining. You can wipe the number off and update it each day.
Any winter sport or activity can keep you busy and choosing something like sledding or skiing will give you the adrenaline rush you crave. Today, while skiing at Steamboat, my mom clocked me at 47 mph, so that's faster than some of the coasters I love to ride. Also, there can be some airtime as you ski off a big jump, and you can feel the g-force if you wipe out and fly down the mountain.
You can get excited for the coming season and the new coasters that are being unveiled by following the construction. Almost every park posts regular updates on construction progress and they sometimes have a construction webcam that allows you to see the construction site live. This year, Banshee and Goliath both have construction cams and I have them bookmarked on my computer so I can check them every day.