How to prevent scarring
 

Hi, I just received a large cut to the forhead, and got it glued at the emergency room. I was wondering if anyone had tips on how to prevent a scar.

The doctor mentioned to keep it out of sunlight. Anything else anyone knows?

Avoid scabs, or picking said scabs. Avoid exposing the cut to air, dirt, or anything that could end up placing the body in a defense reaction (for example: Dirt in the wound will cause a reaction by antibodies because of the bad microbes in the dirt, along with the dirt itself. another example: chlorine in the water may irritate the cut, damaging the new and healing cells, provoking a reaction)
The reaction will slow down the healing time, and encourage more scar tissue to grow.
If your cut is wide rather than narrow (meaning more skin has been damaged) the probability of a noticable scar is much greater.

Consider a topical ointment like polysporin, something that is antiseptic and perhaps antibiotic. Cover it with clean bandage, and replace it fairly regularly. Is the bandage is loose, it'll allow dirt and other bad stuff underneath it, like your bangs.

I would go beyond considering, and DEMAND you use Polysporin, stuff works like a charm, but dont apply too much and make the skin too moist, or it tends to die, like a blister

Once the bandage/pain stage is through, but before the healing is complete, massage the area frequently. It's supposed to break up the long scar tissue fibers that otherwise form and look so different from undamaged tissue.