A most usual problem ignored by many people which unfortunately brings you not only wasting water but wasting your budget as well. Per year this wasted amount of water can reach hundreds of gallons of water which is not something that should be ignored easily. There is a little thing called washer which is usually made from rubber or silicone and rarely of ceramics. Water in pipes is all the time under pressure so it can move when you turn off your tap these washers form a tight seal to prevent water making it way through a pipe out of the faucet. When this little thing at a time become damaged in any way or dislodged here comes that annoying drip. In most cases, you can replace these washers yourself, but there are cases that require special tools and professional hands, especially these made from ceramics.
Low water pressure
Most common cause of this problem is sedimented on faucets aerators, but it may also be related to breaking in the main line of the water supplying system or to the municipal water supply. Water is full of different minerals which are fond of collecting on inner surfaces of shower heads and aerators. These aerators are mostly easily removed but shower heads and some bathroom faucets are little more complicated for this. But In all cases vinegar is the best solution, soaking aerators in vinegar over night or affixing a plastic bag with vinegar on shower head will do the job of dissolving mineral deposits. If pressure still keeps low, it might be a serious issue that requires calling a licensed plumber.
The usual problem causing this is flapper valve not fitting properly anymore. Solving this problem is mostly easy and requires little effort with a usual repair kit. Sometimes of course there are much more complex issues that need to be solved by professional hands. Sediments usually affect proper filling and flushing. This may have a significant effect on your house bill.
Sometimes a clog is not complete, so drainage may be slowed to trickle, and in these cases most often you may repair it yourself. Checking your pipe with a flashlight may show the problem similar to a clump of hair or some stuck little part that is causing obstruction. Plungers are most common helpers in these cases, but the problem is that they dislodge the clog but do not remove it. For this, you must use commercial cleaners and clog removers, but with attention, they can damage inner pipe materials if used too much. If this problem continues regularly, you call your professional plumber.
Most places this happens are near the joints so just keep your eyes on ceilings or grounds from time to time. This can be a unpleasant and costly surprise. These moments usually require professional hands but until plumber appears you may permanently solve it by using compression clamp, leak tape or rubber sheet on a leaky joint.