Some important transactions in ABAP

SE80 ABAP/4 Development Workbench                                                                   
SE03 Groups together most of the tools that you need for doing transports.                        
SE09 Workbench Organizer
SE11 ABAP/4 Dictionary Maintenance                                                                        
SE12 ABAP/4 Dictionary Display                                                                                  
SE16N Table Browser (the N stands for New, it replaces SE16).
SE17 General Table Display                                                                                                             SE24 Class Builder
SE30 ABAP/4 Run time Analysis
SE36 ABAP/4: Logical Databases
SE37 ABAP/4 Function Modules
SE38 ABAP Editor
SE39 Split screen Editor: Program Compare
SE41 Menu Painter
SE43 Maintain Area Menu
SE51 Screen Painter: Initial Screen.
SE54 Generate View Maintenance Module
SE61 R/3 Documentation
SE63 Translation
SE71 SAP script Layouts Create/Change
SE72 SAP script styles
SE73 SAP script font maintenance (revised)
SE75 SAP script Settings
SE83 Reuse Library.
SE91 Maintain Messages
SE93 Maintain Transaction.

Download IDOC data to excel format

Go to transaction IDOC

Select the radio button “Analyse IDoc field values” and click on Execute.
Enter an IDoc number and select the check box “Also output empty fields”. Click on “Output in Internal Form”. Click on Execute.

Now in menu click on List -> Save/Send -> File.
Now select the required format and hit Enter. The IDoc is now stored on your system in the required format.