I'm still tinkering with mine, but I'll share what it looks like at the moment. I do the following;
$1
- WIP's
- Exclusive Sketches
$3
Same as the above, plus;
- Read Ahead (Blue Star Rebellion)
- NSFW (Eventually)
$5
Same as the above, plus;
- PSD Files
- Speedpaints
$10 - $20
Same as the above, plus;
- Commission discounts + priority.
- Etsy discounts.
I only have one Patron, an angel who found my comic on Reddit and pledged to the $20 tier. Beyond that, I still have a very small audience, so I'm not too sure how attractive my tiers actually are, yet.
Good luck!