The soil should be kept moist, but not wet. It will tolerate occasional drying out, but not for prolonged periods, so make sure it is watered before you go on holiday. If the soil gets dry for a prolonged period, the leaves will start to discolour and develop brown tips and spots. Wet soil will damage the roots and cause wilting and yellowing of the foliage.
Leggy growth can be cut back and new whorls of foliage will emerge from dormant buds below where you cut back to. Leggy, or straggly plants can be cut back quite hard and new growth will appear in a few weeks
Over feeding can be damaging, so use a weak solution of fertilizer in the water at every watering
In dry conditions, two-spotted spider mite can be a real problem, so keep the plant misted and the leaves clean. Mealybugs can also be a problem, and they often can be found at the base of the leaves. They need to be removed by cleaning with a damp cloth or paper towel.