Over my years of being homeless, I've learned that taking care of your appearance is important. Especially if you are homeless. Your appearance (as a homeless person) is a resource which can be used as a means to an end.
Not only do I always work to be very hygienic, but I also go so far as using anti-aging products and combing my hair and such....The only thing I don't do is spend silly amounts of money on certain clothes because they are "this fashion" or "that fashion".
Regarding "anti-aging", this allows me (being almost 30 years old) to appear as a person in his early 20's when I try to hang out in restaurants without buying anything or ask for free food.
Being able to be personable and interact with other people (with "the public") is a great resource if you are homeless, and especially since your survival depends on being resourceful.
So, indeed I can conclude that a great asset in a person's life is to care for their appearance and to practice social skills.