random follower gift art is the most common one I think.

make a journal - have people comment on it - you give them a number in a reply - then use https://www.random.org/

Freebee stream with a random raffle thing on picarto ^^ that would be fun :3

I've never been sure what's expected of an occasion like this, but congratulations all the same. :)

Depending on how generous you're feeling, maybe a simple quick bit of your own art to say thanks, or as Rufus mentioned a raffle. Beyond that, it's really up to you. :)

I like the idea of you doing an own art piece, like featuring Kita or something

You could always give me some really nice art and I'll tell everyone how cool you are.

A little personal piece would probably do it. Maybe Kita in either an action-like pose or a more silly, upbeat pose.

Draw something YOU would love to draw, and to include others, perhaps do a stream and/or do a raffle to add a random follower to it? That way it's a win-win! :)

^^Agree with Pixie <3 Do something you would love to draw <3

^^Seconded^^

Congratulations on getting so many watchers! You definitely deserve them :)

Obligatory 300 Watching Celebration with 1 to go????? :oooo

Heheh well I like the idea of a little giveaway or personal piece opportunity, would be very nice I'd think..

Drawing something celebratory with Kita seems like a pretty good way to go about it, maybe a party scene with some random watchers if you are feeling ambitious.

Do a picture of your character drawing something, with a bunch of other characters creepily watching XDD and raffle off the other character spots