hi, i dont know if this is a good advice, but i would suggest making something that is completely different from what you usually do, for example, you would make furry characters right?, you could make something different like, some sort of an abomination of species with unique strats, or like a doctor with an personality of a child and with an monstrous appearence, or a funny antropomorphic object with like some cool abilities (maybe like a security camera with ability to see through everything and summon cool minions), i hope this helps.
 you can also look at others characters (for example my characters from my toyhouse if you want) to think of something through them, no need to make exactly like them, it can just generate a creativity from you, that's how i usually think of characters  
if you are wondering who i am, this is Jorginho88 speaking, you have seen me plenty of times on dave and bambi server through forums, thank you for reading until here