How do you stop timed out in minecraft?

There is no way to make it so you never will. Timing out is caused by a poor connection between you and the server. Here is a list of things that can affect the speed and strenght of your connection;

Your internet speed- Faster speed, better connection.

The servers location- closers the server, better connection.

The servers bandwith- The more bandwith it has, better the connection.

The amount of people on- every peopl on the server uses a chunck of the bandwith.

(ex. 2 people on, each person gets 50% or so. 10 people on each person gets 10% or so) that means you just lost 40% of you connection strenght!