You could define a multi-line macro...
%macro prologue 1
push ebp
mov ebp,esp
sub esp,%1
%endmacro
You could define one for function entry and exit.
%macro prologue 1
push ebp
mov ebp,esp
sub esp,%1
%endmacro
%macro epilogue 1
mov esp,ebp
pop ebp
ret
%endmacro
The argument supplied is how much room you'd like to reserve on the stack.