A very well done job by http://www.atomicax.com/users/nathan-clouse that i am copying here just to keep it for my easy use access!

Warning: 100% copied from the above link!

General description: http://www.atomicax.com/article/full-database-cleanup-routine-part-1

General Ledger

Ledger Journals: https://www.atomicax.com/article/clean-your-journals

Procurement and sourcing

Purchase Order History CleanUp: https://www.atomicax.com/article/purchase-order-history-cleanup

Delete Request for Quotations: https://www.atomicax.com/article/delete-request-quotations-bulk

Production control

Clean Up Time Registration: https://www.atomicax.com/article/clean-time-registrations

Clea Up Production Order Journals: https://www.atomicax.com/article/clean-production-order-journals

Clean Up Production Orders: https://www.atomicax.com/article/clean-production-order-journals

Sales and Marketing

Clean Up Sales Update History: https://www.atomicax.com/article/clean-sales-update-history

Clean Up Sales Order: https://www.atomicax.com/article/clean-your-sales-orders

Clean Up Return Order: https://www.atomicax.com/article/clean-return-orders

Clean Up Sales Quotations: https://www.atomicax.com/article/clean-sales-quotations

Warehouse Management