Early Dark Templar Opening

9 - Pylon
10 - 2 probes (CB)
12 - Gateway (at 150 minerals, may be before 12)
12 - 2 probes (CB)
13 - 1st Assimilator (3 probes on it immediately)
16 - 2nd Pylon
* 16 - Zealot if playing Zerg, save for the Stalker if not
18 - Cybernetics Core (Spend further CB's on Warpgate, research as soon as Core finishes)
18/19 - 2nd Assimilator
20 – Twilight Council
* 19/20 - Stalker (T or P) / Zealot (Zerg)
22 - 2nd Gateway
23 - 3rd & 4th Gateway
24/25 - 3rd Pylon
25/26 – Dark Shrine
26 - Warpgate finishes, transform your Gateways and build a 4th Pylon.
26 - Warp in your first set of 4 units (sentry, zealot, 2x stalkers is a good start). Mix your composition up, 2 is a good number.
34 – Warp in a set of Dark Templars. I use 4. Send them over to your enemy, if you warped in 4 you may want to leave 1 for defense. If they did not build detection, enjoy your victory.