[mahmud]

You deal with it by using said 3rd party libraries 100x before you embark on your "current" project. Know your tools well, inside and out, and you're 10x more productive than someone just starting out :-)

Also, there is something that has to be said for compromise. Get libraries for the language you know best and you will more productive than if you used a high-performance library for a language you don't know. Start small, and worry about scaling or "going big" later.