Which commands are your favorite and you use more in AutoCAD?

Line, trim, extend.
offset and pedit

trim,stretch,extend,fillet,offset,dist,...

Line,Undo,select,move,savetime,mirrtext,covert text into M text ,block,join,freeze ,layoff/on ,draworder,recover,audit,purge,etransmit,xref,merge, bind,SAVE

line , trim , extend , circle

line,offset,trim,extend,fillet,stretch,c- circle,dist,...

line- poly-line - copy - mirror & trim

I think it all depends if you draft in2D or3D, what disipline you are using Civil, Mechanical, Architectural CAD programs. 

Every one has its favorite settings and uses different comands. The most used once shoud be stored in your upper ribbon for easy and quick access; your osnaps should be on and set to your most common usage, my fillets are set to0.1 most common usage; scale text, modify, trim, extend, hatch, rotate, draw line, fence, strech, text, offset are the most commen once I use

Line and pline .

offset , mirror , break , boundry , trim , block , revolve .
extrude , union , substract ,3D rotate...........in3D drawing

Line- l; PLINE-pl; arc - a pedit- pe break-br b-block be-block edit c- cirlce f- fillet x- trim ex- extend o-offset mi-mirror li-list (f2-function key) f3-Osnap on or off f4-3dosnap on or off f
5- isoplane setup left , right, top f6-dynamic ucs on or off f
7- grid on or off f
8- ortho on or off f9-snap on or off f10-polar on off f11-object snap tracking on or off f12-Dynamic input etc etc try these Cheers

l - line m - move ext - extend tr - trim of - offset f8 - ortho on - off