Be dedicated to wanting to get back. If you're not willing to put forth the time and effort on a daily basis then you're going to end up feeling pretty mediocre about being able to ski to the best of your abilities once ski season comes back around. Last season I ended up having to undergo knee surgery (obliterated my ACL and tore my Meniscus up pretty bad) and not missing a day in the gym since I've been able to freely walk again has been everything for my recovery. Making consistent efforts to come back stronger not only works wonders for your strength but also really helps to start breaking down the mental barriers that getting hurt leaves you with. You don't have to kill yourself every day nor exercise for a long time, but just do something for it every day. A habit forms and it just becomes part of your daily routine.
If it's possible, start biking at a gym. I made a goal to bike 10 miles every day before my workout and it has accelerated my recovery like fucking crazy. My surgeon was hyped when I had my 3 month checkup to see how well the muscle had come back. Usually I'm not this serious, nor do I ever take myself this seriously, but surgery and this recovery process have been my life, so I have a lot of input.
Last, physical therapy and stretching is huge. My best friend went through the same injury two seasons ago and did not do his PT like he should've. Over a year later it's painful for him to fully straighten his knee and it makes all sorts of popping and ugly noises when he moves it around. I'm 5 months post-op and I've got full range of motion and my knee feels great about it. No popping or anything. Again, I'm not trying to brag or some shit I'm just stating facts.
Hopefully some of that helps brother.