How to make a command block chain?

1.9+ Answer

For your first command, place an impulse command block. Then, for all subsequent commands, use a chain block on 'always active'.

1.8 and below answer

This is possible with the use of repeaters.

Simply string your command blocks together like so:

This will execute the commands left to right with a 4 tick delay between each when the button is pressed.

The delay on the repeaters can be changed or more repeaters can be added to make the delay between executions quicker or slower.

In 1.9 just use an IMPULSE command with

/gamemode @p 0

then use a CHAIN command block with

/tp @p x y z

(x,y,z should be map coords. use ~ to make them relative coords.)

Make sure the chain block is set to "always active".

Also make sure the arrow of the impulse block points toward the chain block. Slap a button on the impulse or adjoining solid block and you are ready.

If you only need two commands, just plop both command blocks right next to each other:

If you need more commands, line them up with repeaters:

Make sure that the repeaters are facing the right direction. If they're not in the correct orientation, they aren't going to relay the redstone signal to subsequent blocks.