During the time before I did my brakes I trawled for hints and got some (like disconnect the rear caliper and let it hang and turn the caliper to get the fluid into the rear cylinder). But I found one that seemed interesting in particular. It was drilling through an old bleed nipple and back-filling the system.
During the trawl I found the story of one guy who was already into his second bottle of DOT5 and couldn't get the air out of the system. Now when I bought all the parts to do the job, I had only bought one container of fluid to fill both brakes so was a little concerned about the possibility of a problem causing me to run out of fluid. What I did was this (rear brake described as it is the more difficult):
Drilled through the old nipple and used a length of small bore clear pipe to connect a large syringe full of fluid to the nipple. HINT; you may be able to buy your syringe cheaper at the vets than other places, plus they sell HUGE ones.
Start to fill the system and make sure you stop after about 20ml to move the rear caliper around so you help the fluid into, and air out of the rear cylinder, then carry on until your reservoir is full. A couple of minutes spent being sure of this is time well spent because there is no air purging of the rear cylinder when you bleed.
Now comes the clever bit: pump the pedal down quickly and release it slowly to force any residual air out of the master cylinder and or caliper until you have nearly emptied the reservoir or until the syringe is fully extended - whichever comes first. Now, a$$uming you haven't got loads of shyte coming out of your system (i.e. have done a thorough overhaul and clean), you hold the syringe handle upwards so that the air is at the top and force the fluid back through the nipple into the system again, stopping short of the air of course). You shouldn't need to repeat the process, but you can.
The only little tweak for the front that I have found is that with US bars, that last degree of hardness of the lever is gained by leaning the bike right down to the left and turning the bars to the left to get the last air bubble out of the area where the hose joins to the master cylinder which is the highest point in the front system.
This system is good for other DOTS too even if you don't pump the fluid back into the system because there is less chance of damaging brake fluid getting onto your paint.
IF you see all sorts of crap coming out, you can discard that syringe full and refill with clean before starting again.
If you're using DOT 5 note that DOT5 affects the particular rubber of the disposable syringes so you want to do this in one session then throw away the syringe because it gets too ratchety to use the next day.
I filled and bled both brakes in minutes and only used half a bottle of fluid!
Hope this helps!