Now I've always liked the Thruster Pack. Sure, it's next to useless, but it tweaks Halo's physics just enough to have some pretty outstanding effects. The Halo Council made a small tutorial for two such tricks, taking place in Haven and Solace.
If you haven't seen this before, I strongly recommend you do. Like many others, I found the thruster pack to be pretty disappointing. But, with a small bit of knowledge, it's usefulness can revitalize the matchmaking scene. Give it a shot!