For me it is all about the C's!

• Consume content ~ try and find one newbie a day to welcome and consume at least 5 blogs per day.
• Create content consistently ~ being consistent is key, as for content type and quality that is subjective as @dewabrata totally nailed it.
• Curate content consistently ~ Use your power to vote content.
• Comment and Engage as much as possible.
• Consistency goes without saying.

Above all though have fun, if it isn't fun then take a break or look elsewhere as when things stop being fun in a place it becomes mundane at best, something else at worst!

Great question with plenty of food for thought!