The return of hope is a big indicator of coming out of depression for me.
Seeing colour properly, when I'm depressed the world literally becomes greyer, when I'm less depressed I notice and appreciate colour more - this can be an early sign of mood lifting for me.
Negative thoughts lessen off a lot and become a lot less frequent, they also become less intense and less unpleasant (I still may get some but they are not as a bad and are easier to accept and not get caught up in them).
It is easier to laugh and smile.
Eating more normally (I actually want to eat slightly less when less depressed, but appreciate the food more, for some people though if depression led to loss of appetite then coming out of depression would probably mean they would eat more).
An increasing in desire to do things I enjoy doing (and a sudden realisation how many of these I had stopped doing). In general increased motivation.
I can also start to feel more anxious, I think this is linked to an increase in motivation levels, my adrenalin levels start to operate closer to my norm (which for me is a bit anxious).
Reduced desire to sleep and also sleeping more deeply when sleeping.
Also, really appreciating small things in life, fresh air, birdsong, the smell of good coffee, the taste of good food and so on. Making an effort to do this, to be mindful can help lift me out of depression to some degree when I have setbacks.