Confident, easy-going guys who are willing to help others (within reason, like if they're not already busy).
Hygiene is important. Literally no one wants to date an unwashed slob, not women or other men. Shaving isn't necessary, but shower and deodorant is required.
No one wants a guy who is desperate. It triggers womens fight or flight instinct and a desperate guy might actually be causing women to be more attracted to the guys who do offer safety from the creepy desperate one.
Being good with kids is a huge turn on for women for obvious reasons.
Show competency. Competent people are extremely attractive to both sexes. Show you are good at something, knowledgable, willing to teach it.