Open a separate high interest savings account, and put away a set percentage of your income away every week without any emotion attached. Save what you can afford. If it's 10% that's great. Do not take this money out until you have reached your savings goal for that holiday or other life experience.
It really depends on (how bad) you want that one thing.
How much are you willing to give up certain things, you now have that cost money.
e.g. cut your food bill in half.(it is possible).
cut out that take out coffee 100%
cut out going to the movies 100%
cut out buying 'any' clothes 100%
cut out even Internet and land-line, just have a mobile?
It depends as I said 'how bad do you want it'..the rest is your choice.