I have 2 main fitness goals this year, one of them is impossible (but worth striving for regardless), and the other is realistic if I'm very mindful about it.
Realistically, I want to train as hard as I can without injuring myself. I was in a really bad car accident a few years ago and shattered my pelvis and knee, broke my ankle, and severed some tendons in my leg. After all the surgeries I have enough metal in my legs to build another bridge over Lake Washington. I was in a wheelchair for about a year and had to do the whole "learn to walk again" thing. Leg muscles atrophied a ton and I was feeling sorry for myself and used it as an excuse to let myself get out of shape. I still have a lot of residual pain/arthritis/nerve damage. I really pushed myself last fall and was able to do 40 pretty intense mountain miles over 5 days. I was very happy to be back to a state where I felt more confident in my physical abilities. I'm just getting back to the 10+ mile hikes on a regular basis, and I just need to be careful not to overdo it. If I hurt myself and have to take a few months off to rehab I am going to be really upset with myself.
The impossible goal is to never have the "wow I should have trained harder" moment on the mountain come September. Never going to happen, but I can damn sure try!