There are so many. . .
The bad habit I have that bugs me the most is not finishing what I start.
I get really really excited to start a new super cool project, get halfway through it and set it aside, never to be touched again.
For example: I painted a lovely landscape painting soon after I had Simon (4 1/2 years ago) and I still have not finished the painting. I hung it up in my house unfinished, unsigned, and unframed.
When I cook, I get out all of the ingredients, make a yummy something-or-other, and then leave most of the ingredients out on the counter when I'm done. It makes for a messy kitchen.
I have painting projects, sewing projects, knitting projects, home and yard projects, that all get started and never get finished.
I'm going to make a goal for this year (and the rest of forever) to do my best to finish everything that I start.