To continue what I said over on FTW about 5th ed, I must tell you how this has helped me.
Now, I find that if say you had a squadron of 3 landspeeder typhoons, you can cause a lot of anti-infantry and maintain good anti-tank but, they can get shot to pieces.
Now, I deepstrike them or keep them in reserve, when they come in I try to keep them out of trouble until about turn4, then I make a mad dash for an objective and contest it, this works even better with eldar jetbikes.
Other things you need to do are:
Take lots of troops.
Still take good units to kill your opponents troops.
Keep your mind on the mission.
Take out your opponents troops.
Harrass your opponent with a unit he fears (my friend thinks dreadnaughts are the end of the world).