HELM CONTROL 

As a helmsman, always sit on the windward side (or the high side) of the boat.

Luffing always means moving the helm away from you and bearing away always means moving the tiller towards you. After some time this will become automatic and natural . Steer straight ahead by looking alongside the mast and forestay to the background. Practice both short and gentle turns. Try to use the helm relaxed, as little as needed and slowly.  Practice steering with your body. To do this, take the tiller under your arm. This will give you two hands free to quickly control the sheet. Make sure that the rudder position remains the same when luffing. Aggressive use of the helm can be useful to quickly stop the boat for example with a scharp turn into irons.

When luffing, we first steer so that the boat turns towards the wind, the sails start to slacken a little and then we pull in the mainsheet. The jib sheet always follows a little later. Heel/weight to leeward helps with luffing the boat.

When bearing, we first loosen the mainsheet and then we steer the boat away from the wind. The jib sheet always comes in a little later than the mainsheet. 
When bearing off, heel/weight to windward helps.

The steering effect of the sails and the heel then do their job optimally.
When loosen sheets , do not let the sheet slip through your hands. This can cause burns or blisters.