When I was using tasm while writing code I used a macro:

calle MACRO x
extrn x:PROC
call x
ENDM calle

then I just wrote:

calle somefunction

and that was enough. I also recommend to read some optimization trick, because they can be quite useful when writing in asm. I learned then by heart and now with c++ I'm still trying to use them, although the compiler's optimizer will "do that for me" it's just a habit :P