It is very important to accept you are injured and make your priority healing. If you are truly injured, fighting through the pain will only make things worse. It may feel like training through pain is making you stronger, but it is only making things worse. You will end up compensating for your injury, and tweaking a joint or muscle that was fine to begin with.
Injuries are very depressing, it is important to Stay positive during these dark times. Talk to your teamate, friend, coach, or anyone you trust about what you are going through, it helps to know you are not alone during your struggle. Be postitive, believe that your injury is only temporary, if your doing everything in your power to heal, you will get better, it just takes time. Be proactive, Seek out professionals like your Doctor, Physiotherapist, Massage therapist, Chiropractor, these people will help you get better. Also, learn about your injury, there are numerous of awesome websites, and books to help teach you about your body. I found very helpful watching weightlifting videos and motivational videos on YouTube whenever I felt down.
Stay focused, remember why you started lifting. Have a vision on where you want to be a month from now, or a year from now. Being injured doesn’t give you a free pass to stop lifting, it gives you time to work on areas that get ignored during your usual training cycle. Be confident that you'll heal and you'll be back to normal training in no time. Continue to work on your mobility, where possible. Continue to have good nutrition. Continue to go to the gym and do what you can. Set goals to get stronger in any lift that you can do, and set goals in healing your injury. If you can squat, spend time strengthening your squat. If all you can do is press, then get a strong press. Weight training is meditation and continuing to lift will help stay positive and will make your body stronger.
Adversity makes the man. Its the hard times in life and training that separate winners and quitters. The sooner you accept an injury, the sooner you can focus on healing it. Stay positive, attitude is everything. Stay Focused, believe in yourself and be confident you'll be back to normal training in no time. Whatever you do, keep moving forward!