So creating a little mini Bio of your character can help.
the below is the example of the ones I use.
Which are based off of a suggested one from Writers Digest and modified to what I most often am concerned about.
So there you have it a tip to help you improve character development. Remember just because you write it on this sheet you don't have to incorperate it into the story, andremember you can always go back and add or subract things or Change things. God Knows I do....