Hey there, hope you doing well!
Here's some preparation tips

• Prepare and strictly follow a SCHEDULE

• Mix and Match and balance between the subjects:- for example, take theoretical subject like Economics and a practical one like Accounts in pair and study both in a week / day.

       A language that is English with a theoretical or            practical subject, and likewise try other permutations and combinations.
   With this you'll not get bored and learn in efficient manner

• Try sample papers daily when exams are coming
• Indulge yourself in games and activities to keep yourself fit and healthy. Meditate daily!

Here are some tips as to how you can go about EACH SUBJECT for commerce class 11:

• Go through every theory, rules, terms, concepts, definitions and their explanations, before starting to solve the practical sums is important.
• BUSINESS STUDIES is a theoretical subject which contains various advantages, disadvantages, features, definitions, etc. and few numerical here and there read each of them and use sticky notes or make your keywords for simple understanding.
• ECONOMICS is again a theory subject and includes market and economy related concepts with graphical representations and data for better understanding.
• ENGLISH is a wide subject with comprehensions, grammar, literature, reading and writing skills. This subject cannot be taken lightly and needs to be kept in touch with and included at least 3 or 4 times a week.
• MATHEMATICS is a practical subject which includes many formulas and derivations and needs logical application and cannot be solved without being paid full attention.