How to do well in Physics...

1. apply common sense first in all situations...
2. understand the theme...
3. understand the concepts...
4.identify the basic principles...
5. identify the formulae, relationships and develop application skills in the specialized domain...
6. be a master in calculating the unknown quantities...
7. verify
8. draw conclusions...

Develop Deep concepts, draw proper diagrams, and then, use your power of mathematical analysis...these systematic steps will certainly keep your motivation high, and you will be able to develop enough self-confidence...