What are the best and suitable ways to prevent data entry errors or mistakes?

KEEP UR ATTENTIONS100% ON WORK WHEN U R DOING YOUR WORK

focus on the reading, review all before confirm, take small rest with coffee or tea.

من الصعب عدم حدوث اخطاء لكن التقليل قدر الامكان من الاخطاء وذلك التركيز والانتباه وعدم العمل في جو ازعاج او مكتض بالناس وخاصه المتحدثين وعدم العمل وانت تعبان او مرهق Difficult but mistakes do not occur minimizing mistakes and focus and attention and not to work in an atmosphere nuisance or Moktd people, especially non-speakers

Concentrate on your work.

This would depend on the tools being used.
If data is captured through technologies, then exported to any data files, an aggregate checking should be done to compare frequencies of both output.
And if your very much familiar with how your data would look like, and achieve different result in your aggregation, then you can possibly caught an error.
When data is entered manually in a database, SQL is a very useful tool to check for errors.

* Data validation is awesome tool in Ms Excel to shorten the human typo errors.

Lock the fields for unique values.
Put validation checks on data at application interface.
Be vigilant during data entry

1) Put validation checks on data at application interface before submitting data to storage..2) Apply contraint checks at DB level to ensure data integrity.

familiarization of keyboard and review all the data input using Ms word review or excel..

One of the powerful features in excel is data validations.You can set up different types of validations on data entry.Secondly, you can use conditional formatting to highlight any deviations.Thirdly, you can use trace changes feature available in excel whereby an independent manager will review you data for a final check and would accept all the right changes and reject the ones that are not necessary.Finally, you can lock different sections of a worksheet to avoid people messing about with irrelevant sections.Try using formulas and excel automation features where possible.

- Avoid stress and don't do work in a hurry.
This is the main cause of errors.
- Create a good work environment, keep you office in order.
- Use validation techniques.
- Use quality control procedures.