tip: when you push the piston back on the front calipers and the cylinders back on the drums - open the bleeders and block off the hoses (clamp them lightly) to avoid pushing dirty fluid up the hoses and into the brake system. Most systems DO NOT like dirty fluid being PUSHED backwards, and pushing caliper pistons back often dislodges dirt - right into the ABS controllers, etc. When pistons are back (fully open), release the clamps, and leave the bleeders open - and the system will gavity bleed for you. The more and cleaner the fluid you add the better. (flushing is a great idea!)
Failing to do this can prove to be very expensive on some systems (90's Ford F series, GM light trucks - and most others!)
Also saves the bleeding hassle!