Everyday American English Expressions - 2 Small Talk

Expressing your state of health and happiness

Fine.
I'm fine.
I'm cool. (slang)
Keeping cool.
Dandy. (informal)
Fine and dandy.
Great.
Couldn't be better. (ေကာင္းလိုက္တာမွ၊ ဒီထက္ကို ပို မေကာင္းႏိုင္ေတာ့ဘူး။ :D)
Happy as a clam. (cliché)
Okay.
All right.
(I) can't complain.
No complaints.
I have nothing to complain about. (ေကာင္းလိုက္တာမွ ဘာမွ အတြန္႔တက္စရာမရွိဘူး :D)

Telling how you have been doing - positive

Keeping busy.
Keeping myself busy.
Been keeping myself busy.
Keeping out of trouble.
Been keeping out of trouble.
Been up to no good. (informal)
Been keeping my nose clean. (informal)

Telling how you have been doing - neutral

Getting by. (ဒီလိုပါပဲ မဆိုးမေကာင္းေပါ့(ပိုက္ဆံ))
Been getting by.
Fair to middling. (folksy)
So-so. (informal)
Plugging along. (informal)
Could be worse.
Could be better.
(Just) muddling through.
Same as always.
Same as usual.

Telling how you have been doing - negative

Not good.
Not so good.
Not too good.
None too good.
Not well.
Not very well.
Not so well.
Not too well.
None too well.
Not so hot.
Not too hot.
None too hot.
Not great.
Not so great.
None too great.
Crummy. (slang)
Kind of crummy. (slang)
Lousy. (slang)
I've seen better days.
I've had better days.
Could be better.
I've been better.
I've been under the weather. (idiom) (ေနမေကာင္းဘူး၊ ေနမေကာင္းတာၾကာၿပီ။)

(Source and references: NTC's Dictionary of Everyday American Expressions)