1.Don't wear dirty clothes, wear something that fits

1. Take care of your skin (don't eat tons of junk, wash your face regularly)

2. Shower every couple of days (and always after working out)

4.stand up straight (unless you physically can't)

1. smile with your eyes (smile at the mirror, if the skin around your eyes moves, it's a "genuine" smile, think of a good joke or a funny image and you'll get there)

And 6, stay positive and treat people with basic respect.

It won't make you attractive, but it takes a whole lot of "ugliness" away.

Seriously, it's relatively simple. Spend few hundred dollars on a few nice (and fitting) sets of clothes that you can see yourself going out in the public in, take care of your hygiene and smile.

It's not a magic solution, but might get your confidence up, you beautiful datballsdeep69.