I will second Ex and recommend practicing the "invisible aerobars" (and apparently riding a Ridley Noah). Keeps your CDA down, is arguably more comfortable, and you don't have to pump blood to the triceps to hold up your upper body.
Having said this, be prepared to fail. You frankly don't have the power to be holding off any field solo for any great period of time. However, repeated attacking will increase your chances that you will be either in the winning break, or have more fun than you ever had before in a race. So practice your "TT starts" either flying (say from 20+mph) or standing. In either case, you want to launch up to speed quickly, and then hold a solid speed for the next two minutes. Slow down, and do it again.
Now you said that you wanted to address FTP. Fine. Do that. But do it in your breakaway position. In the drops, invisibars, or whatever, but don't do that stuff from the tops or the hoods. you want to simulate the position in which you will be using your power.
Oh, and yes, head is a HUGE part or your aeroness. Tuck it down just like I did NOT do in this pic.
