Do you have the cash to sort it out? It could be a weekend project - haircut, new skin products and better diet/more water (if relevant), more fresh air, go shopping for a more rational wardobe etc.
If you are strapped for cash you could certainly still sort your skin out and make the effort to wash/blow dry your hair regularly and do nails etc.
Oh and go through your wardrobe and mend/throw out anything that is really shabby. You are bound to have some wearable things in there that have got pushed to the back and become fashionable again (or is that just me?!)