So good tips here. For me, I love winter, yes it’s cold and sometimes grim, but on those crisp days, big blue sky, there is nothing better than cycling down a deserted country lane.
Having a proper winter bike helps. Full mudguards are a must. You’ll enjoy getting it muddy. Unlike the best bike, which I hate getting muddy. You also don’t have to clean it after every ride, so that cuts down on post ride faff.
Good winter clothes are essential. Without that any ride will be miserable and cold. I blogged on this very subject last winter: http://ridingcircle.blogspot.com/2014/12/because-winter-is-hard-enough-what.html
Set yourself a challenge. The 500 mile a month thread here is a good start. Sign-up to a few strava challenges, that will also help
Find a few routes with a good cafe stop. Essential in winter
As other shave said, Cyclocross is huge fun and mixes your riding up abit.
Enjoy your next ride, take some pictures, and look back at how fun it was, you never regret any ride you go on.