
I am a big energy waster, because I always try to keep people at full health. When people are at full health, they tend to rush more and give you a bigger chance on masters reward for your missions.
In order to keep people at full health, you need to keep on casting heals and don't be scared to waste healing powers. Ofcourse I am talking PvE here. Don't you dare using that strategy in PvP

I have long experience with monking, but I am a slow developer. Sometimes I play for days without any good heal, just testing how it works. Since I am not very good in timing, I needed to find the cheapest and easiest healingbuild possible. Here it goes:
Mo/Me
4 Inspiration Magic.
14 Heal Prayers.
13 Divine Favor.
Orison of Healing
Healing Light {E}
Signet of Devotion
Heal Party
Mend Condition
Inspired Hex
Vigorous Spirit
Rebirth
It goes as follows:
Try using SoD as your main healing source. It has a 5 second recharge, so it's kinda slow, but it is free. It heals for 89, and that is pretty good for 0 energy

Cast Vigorous Spirit on your damage dealers, unless there is a chance that the bad guys shatter it. VS works very well with Healing Light, giving you 2 energy in return, every heal. Making it heal your tank for 96, at the cost of only 3 energy. Not bad, since you regenerate energy at full. Casting this, in combination with VS makes you actually win energy. I thought that Dwaynas would work here too, but since it can't be cast on yourself, you rather not have that one on your skillbar. Cast VS on yourself, Healing light and Orison, and very few warriors can kill you with that healing power. That is where your Divine kicks in.
You never have to hessitate to cast Heal Party, since you'll gain the lost energy back in about 3 seconds, casting SoD and HL.
I spam mend condition, though I know very well it's futile, since the poison keeps on coming back. Don't bother to shout "I have blind on me!", because I see you

Inspired Hex gives you 6 energy, at the cost of 5 energy. That means you removed a hex for free. Drawback is that it's replaced mostly by a complete useless spell for 20 seconds.
Rebirth is your enemy. When you use it, all your hard earned energy is gone. You didn't keep your energy bar at full, just to lose it all on Rebirting someone. Try getting yourself something that gives you -5 energy. I have a big hammer that gives me -5 energy, when I switch to it. I cast Rebirth and switch back to my main staff. Instantly I have about 25 energy again. I have learned that energy stays in your pool, no matter what weapon you use. It is just hidden, out of reach from pesky mesmers and the negative effect of Rebirth. It instantly comes back when you switch to your main focus. There are obviously more weapons that give negative energy, but I haven't found that yet. I would like to have -10 energy, for a better effect. That would give me 30 energy when I switch back.
Anyone have something to add?