Bad weather can have tremendous influence on a person. Some people are so down about bad weather that they cry. With respect to working out and studying you must summon the motivation from the inner you. Try looking at the positive aspects of working out and studying.
I lift weights myself, I study martial arts, and study the Bible. Doesn't sound very exciting does it? The list below is what motivates me and keeps me motivated.
1. I'm physically stronger.
2. I have endurance.
3. I've gained self respect and confidence.
4. I feel safer walking down the street at all hours of the night.
5. Every time I open the Bible, I learn something new.
6. Others respect me for my achievements.
7. Because some of the passages in the bible are difficult to understand, I have to focus more then usual while reading to grasp it. This focus makes lighter reading much easier.
8. All of this allows me to set certain goals, and when I achieve them, it feels awesome!
It's a very good feeling when you start to see the results of your work. This is the key to keep on pushing more. Learn more, and get even more results. Once you feel how good it is to see these results, your motivation will kick into overdrive.
Love yourself, respect yourself, challenge yourself, then congratulate and praise yourself. You will transform into a well oiled machine of success and courage.