so I went home early

[Winwin2011]

I was feeling a bit tired, so I went home early.

Is it possible to leave out 'comma' before 'so' in the above sentence?

 

[tzfujimino]

I was feeling a bit tired, so I went home early.

Is it possible to leave out 'comma' before 'so' in the above sentence?

Hello, Winwin.:-D

When I need to connect two clauses using a coordinating conjunction, I always put a comma between them (The comma is put before the conjunction).
I wouldn't leave it out.
For your reference: http://www.chompchomp.com/terms/coordinatingconjunction.htm

 

[Rover_KE]

I would leave the comma out. The meaning is clear without it.

 

[Barb_D]

I am like tzfujimino - when there are two independent clauses joined by a "FANBOYS" conjunction, I used the comma almost 100% of the time. However, the trend is growing to omit it when both the clauses are short, as they are here.

I wouldn't mark it incorrect if I were your teacher.
I would edit in the comma if I were your editor and the style choice was mine to make.