Don't forget to rest
Strength training causes tiny tears in the muscles, which then heal stronger than before. These tears are good, but only if you allow them time to heal properly. The average person needs 24 to 48 hours of rest to heal in between workouts so make sure you allot yourself that time. People are often more gung-ho at the beginning of their workout program and sometimes overdo it. Listen to your body. Soreness is fine, pain is not.