To give an effective speech, you need to encompass the environment in which you are in.

For example, in a small room you are likely to use less volume range than you would in a larger room.

You should also keep in mind the stage area that you're presenting from and build that into the timing of your speech.

If you can, scope out the venue ahead of time so you will know if you'll be speaking from the floor or a stage and if so, how high is the stage, how close to the audience can you get without the front row straining their necks to see you. You also need to keep in mind how wide your speaking area is. Will you want to be speaking while you walk from one position to another.

We're taught in Toastmasters not to pace. It can be off-putting to the audience. Mentally divide your speaking area into blocks, three for a minimum. Use these mental stage areas to present different parts of your speech across the width of your speaking area.

If you have room to go backwards and forwards you may want to use a cross type pattern or even a block of 9 squares that can be used to give depth to your movements.

If speaking from the floor, create an imaginary line in front of the audience. You don't want to cross this line. Trust me, nobody wants to look at your crotch while you're speaking!

So, plan ahead. Build your movements into your speech and realize how many additional seconds you need to make a transition from one of your mental speaking areas to the next