Before Positioning:

Before using your turntables and mixers, make sure that they are on a desk or surface that’s as stable and horizontal as possible, like in this picture.

You should try to avoid exposing your gear to direct sunlight, or to humidity and it should be kept in a ventilated room ( it’s your gear, you should take care of it).

Try keeping your gear out of the reach of children (for obvious reasons).

DJ Equipment Positions:

If you’re a Hip Hop DJ, you can put your gear in "Hip Hop position"(H), as shown in this picture.

This position is ideal for scratching but it’s not the best for mixing because it’s easy to accidentally touch the needle and damage the record. But it’s all a question of habit.

You can also put your gear into "mix position", like in this picture (note how the turntables have been re-oriented compared to the (H) position.

This position is perfect for mixing and scratching.

If you're into Beat Juggling, you can put your gear into position (H) but also in to "crazy B" position: 2 turntables next to each other like in this picture.

This position lets you to do Beat Juggling very quickly.

For Beat Juggling-Cutting I recommend this position, which is really nice for Cutting.