Before throwing away a broken tool, consider if it can be repaired. Many problems are simple to solve.
For power tools, first check the cable and plug. Often, replacing a cable is more economical than buying a new tool.
For manual tools, most repairs involve replacing parts, such as handles or blades. These are usually easy to find.
If the repair cost approaches the cost of buying a new tool, then it is better to invest in a new one. However, for quality tools, repair is often worth it.