Tcodes : SD

OV51 -  Report program for customer changes

EWCT - Check exchange rates

SFW5 - To activate business functions

VL06O - List of deliveries based on several criteria (very useful)

VF31 - Billing outputs - bulk - you can print all invoices at a time

VD53 - Customer material info records
VD59 - Customer material info records - Report

VL10A - Create deliveries in bulk
VL06P - To print Picklists  (If picking is already done, you cant do this again - but a workaround is that remove 'Picked Qty' from Delivery and try again)

VL09 - Cancel PGI of Deliveries.
VL22 - Display Changes for Delivery (quite useful for deleted deliveries)

VOK2 - Maintain Output determination - a good tcode (similar to NACE)

VV21 - Create Output conditions - Shipping
VV71 - Create Output conditions - Transport  (ASNs)

V_V2 - Rescheduling Sales and Stock transfer docs - by material

VT01N - Create Shipment for deliveries..

V.25 - Release Customer Expected price
VKM3 - Release credit block

Handling Units Tcodes:
VL74 - Output from Handling units
VV63 - Display Ouput: Handling Units
HUOBD - Display HUs for Outbound Delivery
HU03 - Display of HUs
VLMOVE - HU Goods Movements
HU02 - Creating and changing Handling Units
HUMO - HU Monitor