Remeber it's all about the 4 GCD "rotation"! You want to proc your HIB every 4th ability.
Filler - Filler - Proc - HIB
That means you use your Tactical Surge or Stockstrike as ability nr. 3 every time. Using HIB on a target with your bleed on it gets you some energy back + HIB itself is free of energy. I would suggest you train your opener a bit. You can actually start better by using explosive surge out of target range to proc HIB and then do your opener. Just normal run to your target, dont leap.
The old dulfy guide for 3.0 is still valid in terms of rotation and energy management.
http://dulfy.net/2014/12/07/swtor-3-0-vanguard-tactics-and-plasmatech-dps-guide-by-kwerty/#Rotations
Edit: And don't use your free shots till you actually used both your energy regens first.