If a player considers fielding to be a burden, he/she will never be able to put heart into it. In order to improve your fielding, you need to start enjoying it. In the field, you should be anticipating the ball every time and stay ready.
Physical fitness and agility
In order to become a good fielder, you must be physically very strong and flexible. A youngster should work extremely hard on his/her fitness if he/she aspires to become a professional cricketer. A high level of fitness will allow you to move swiftly in the field, while strengthening your throwing arm and legs is imperative as well.
Practice high & low catches
During your practice sessions, or before the start of every match, you should practice high and low catches. In every practice session, you should take 100 low catches and 15 to 20 high catches. Consult your coaches and take tips to improve your technique.
Catching in slips, gully, circle or at the boundary line require different practices. Make sure you practice catching under supervision so your coaches can correct you on the go.
Ground fielding is as important as catching. By saving runs in the field or running out a batsman, you can put the opposition under pressure.
Eyes on the ball
The most crucial rule, no matter where you field, is keeping your eyes on the ball at all times. If you follow the ball from the time it is bowled, you will be in a better position to respond quickly.
Accurate & fast throw
Even if you have safe hands and are a fast mover in the field, you won't do a lot of good if you do not have a strong throwing arm. Practice over-arm and under-arm throws in every practice session and try to be more and more accurate hitting the stumps.