The guys have got this covered already. I've got some firsthand experience though having dropped 20 lbs from the holidays this year by doing the following;
Eat at a 500 calorie deficit daily - really be accountable for what goes in your mouth. I weighed everything for a while to get used to putting the right amount of stuff on my plate - I'll do it every so often to check I'm not subconsciously going back up on it.
Watch the carbs. I work out - run most days so it's slightly different to you - but on days when I'm not working out I try and eat very low amounts of carbs - 80g or less, and eat more protein and fat. Fat isn't the enemy - carbs are.
Try to be sensible with the booze.
Have a day off every now and again - if you have a bad day so what. Get back on the horse the next day and don't give up. The most important thing in a diet is the persistence you have.
A typical day for me (I'll give you today) was as follows;
Breakfast - quarter of an avocado (pulped with some lime juice and some salt/pepper), a chopped tomato and olive oil, some dried herbs and a fried egg all on a single piece of toast (whole meal),
Lunch - bacon! Hell yeah! Some more avocado because I'd alreDy opened it, some Greek style yogurt and some blueberries and some honey,
Dinner - a big salad - bell peppers, cucumber, leaves and cilantro and some other stuff - a whole lot of tuna and two boiled eggs (medium boiled so they just run when broken). A bit more olive oil etc so don't be scared of fat - you can put mayo on.
Then some more yogurt and blueberries.
I had some jerky as a snack, and a bit of real cocoa dark chocolate after dinner with my coffee - but I had a 5 mile run also so I felt I could do a bit more. I get you can't exercise with your injuries but it does make life easier and a bit more fun because you can eat more!