When a baby is crying, picking them up may be enough to pacify them, or they may need feeding and/or changing too - these procedures should be tried first. Check too that their clothes aren't too tight, especially around toes and wrists, as sometimes a loose thread, ribbon or tight cuff can cause pain.
Some very young babies just need comfort or wrapping more snuggly (as long as they can't overheat) while others need more attention, especially if over two months. Many babies are soothed by being sung to, by soft music, by a tape of "womb" noises, or even by the sound of a nearby vacuum cleaner or tumble dryer.
Taking a baby out in their pram or in the car often works, but some may cry on returning home. In practice, dummies are very useful for many crying babies, as long as the parents are scrupulous about hygiene and do not use a dummy constantly.
Picking up and rocking a baby and talking to them is often the most effective pacifier, but obviously one can't do this 24 hours a day.
A baby who cries a lot puts enormous pressure on the parent and the whole household. A mother may feel inadequate if she believes people who tell her the baby's crying is somehow her fault (which is unlikely to be true).
Getting away from a crying baby is sometimes essential for a parent's sanity. Even leaving the room can work wonders if it puts a mother out of earshot for 15 minutes (but first she has to make sure that the baby can't come to any harm).
With a demanding baby, a parent just has to accept that less will get done. Things will improve, but for the time being it is best to be realistic about chores and aim to do the minimum necessary for safety and hygiene. Many household tasks can be postponed. When a crying baby does stop, a harassed parent is better off lying down for a rest rather than catching up on housework.
Some babies cry mainly at night instead of sleeping and letting their parents do the same. There are a number of ways one can help a baby sleep at night - from having a peaceful sleeping place to instituting a calm and predictable night-time routine.
Some of the resources at the end of this information sheet are also useful for sleeplessness.