Lens hood, lens pen, and LCD protection

Lens Hood:

I use a Hoya multi-angle lens hood. It cuts the flare and improves constrast (less washed-out pictures), especially on bright days.

Lens Cleaning:

My philosophy on cleaning is that I do not clean unless it is absolutely necessary. I use a small blower to blow off any particles. And I use either a lens pen (got mine from Circuit City) or a microfiber cloth to deal with smudges.

LCD Protection:

I use da protector. It attaches to the LCD in the back of the camera to protect it against scratches. It makes the screen less bright, so you'll have to adjust the brightness of the display.