how to program faster and be more productive

Know the problem, know the technology, make educated decisions, know the tools, don't reinvent the wheels, stay focussed, work in a decent methodology, avoid redundancies in any aspect (methodology wise as well as code wise), don't do gimiks - only develop what you are supposed to develop, clarify expectations of the stake holders early enough, ...
This is just a few aspects - not in a particular order - that can be viewed as "experience".
In the end it's a matter of doing-retrospect-improving loop.
Identify on your work mode what you think is the biggest impediment, work on that, go to the next. The hardest work is maybe to confess some own weakness in not staying focussed, or developin gimiks, etc.
Cheers
Andi

When Programming, use a technique called "Wired In", which is when you listen to music, such as trance music, to keep on concentrating on the programming so you don't get distracted. It is a much faster way of programming.