1. Understand each definition by working out on each word used in it, refer to diagrams and imagine the mechanism discussed.

2. Solve numericals by analysing the examples, more numericals may leads to greater clarity of the concepts.

3. Learn to interconnect two properties like :

Pressure by gas molecules and its dependence over temperature

Pressure is force per unit area normal to force

Force is rate of change of linear momentum

momentum is product of mass and velocity

velocity is related to energy

energy is related to temperature.

Now reverse it 

higher temperature means more energetic gas particles

more energetic gas particles means greater velocity

greater velocity means greater momentum

greater momentum means larger change in momentum

leading to greater force which in turn may lead to higher pressure.

Note- If the piston of a cylinder containing gas is free to move then on heating (or increasing the temperature) the gas, pressure remians constant (as piston get shifted due to increased force by the gas molecules) and volume increases due to faster moving particles/molecules while if piston is fixed then volume is fixed so on increasing temperature the pressure will increase. 

4. Be good at interpreting formula; viz. learn to deduce dependency of various parameters on each other involved in a formula.

For example, in   v = a*t 

means v is directly proportional to a if t is constant in words greater acceleration, means greater speed after a particular time t .

in a = Force / mass

acceleration a is inversely proportional to mass m for a fixed force. In other words for a heavier body the same force will generate lower acceleration.

It is quite easy to check facts if formula is known to you.

for example- 

Whether resistance for a conductor inreases or decreases with increase in temperature ?

one way - increased rate of collisions between free electrons will increase resistance.

Another way-      R2 = R1 (1 + alpha * t )

as alpha is positive for conductors so final resistance R2 will be higher than initial resistance R1 after increasing temperature by t. 

Best Wishes.