You will need lessons from a professional. Without seeing you swing etc there is no real way to make any recomendations for improvement. I have been playing about 5 years and play off 6. But the first 2 or 3 years are where it is easiest to shave off 5 or 6 shots a year from your handicap as this is where you are doing most wrong!
If you playing at Fleming park, i think the pro is or at least used to be Ian Warwick, he was the pro where i used to play and left for fleming park and gave me my first 6 or so lessons when i was starting out. Thats the only real way to see improvement and maintain it! Other than that the advice of putting and short game practise is sound. You can save your round by getting up and down as often as possible and improve from 100yards in.
Also, try dividing your scorecard up on a round, have a section for fairways, greens in regulation and putts, and tick if you hit a fairway or GIR and enter the number of putts, you will soon see where your struggling most.
Good Luck!
Golf will infuriate you but is worth it once you start to see the fruits of your labour!