There are several techniques that businesses and individuals can use to forecast future events or trends. Some of the most common techniques of forecasting include:

1. Time series analysis: Time series analysis is a statistical technique that uses historical data to identify patterns and trends in data over time. This technique is often used to forecast future trends based on past patterns.
2. Regression analysis: Regression analysis is a statistical technique that uses historical data to identify the relationship between variables. This technique is often used to forecast future outcomes based on the relationship between different variables.
3. Qualitative forecasting: Qualitative forecasting is a technique that relies on expert opinion and subjective judgment to make forecasts. This technique is often used in situations where historical data is limited or unreliable, or where there are significant changes in the environment or market.
4. Delphi method: The Delphi method is a technique that uses a panel of experts to make forecasts based on their knowledge and experience. The experts are asked to provide their opinions on future trends or events, and their responses are analyzed to identify areas of agreement or disagreement.
5. Scenario planning: Scenario planning is a technique that involves developing multiple scenarios of future events or trends and evaluating the potential impact of each scenario on the business or industry. This technique is often used to identify potential risks and opportunities and to develop contingency plans.
6. Econometric modeling: Econometric modeling is a statistical technique that uses economic data to forecast future outcomes. This technique is often used to forecast economic indicators, such as inflation, GDP, and interest rates.

Overall, the choice of forecasting technique will depend on the specific situation and the availability of data. Combining multiple techniques can help to improve the accuracy of forecasts and to provide a more comprehensive understanding of future events or trends.