How to make thumbnails for a series

[Spooncer]

So most of my videos are in a series on my channel. My thumbnails right now are mediocre at best and I was wondering how I should design thumbnails for each series and what text should be on the thumbnail. Any suggestions would be great. Thanks.

 

[Mortinious]

Well, your channel link doesn't seem to work, check out the Useful Site Information forum for a fix.
As soon as i can check the channel i might be able to give some advice.

 

[Spooncer]

Channel link should be working now.