Front pads are very easy.
First step I'd suggest is to push the pistons back into the caliper, just push the outside of the caliper onto the disc on its sliding pins and the the pistons will be pushed back by the pad.
Next unscrew the caps over the caliper pins, I have taken to using an impact screwdriver for this as the caps and heads are pretty soft.
Next unscrew the pad pins and slide these out, the old pads will probably just fall out. Clean up the pad pin and remove any corrosion, then add a little copper slip to it.
De-glaze the disc with a scotchbrite pad and brake cleaner.
Slip the outer pad into place, make sure the far end goes into the locating tabs, then slip the pad pin in to hold it. If the pin does not slip in easily, the far end of the pad is probably not in the right place. Now repeat with the inner pad, again make sure to get the far end into the locating tab, then move the pin in the rest of the way and screw this in, followed by the cap (put a little copper slip on this also).
Brake pad changing time is a good time to give the caliper some love, and I would actually suggest taking the calipers off the forks/discs, cleaning the pistons (scotchbrite pad/toothbrush) before pushing them back into the calipers, and cleaning and re-greasing the sliding pins.