i smoked a about three times as much as you per week, which still isn't very much, albeit it was only for about a year. if you do any serious sport you realise how shit it makes your performance, in your case if you quit for even just a couple of weeks you will see real benefits to your fitness. Its absolute shit for your immune system as well, this was the big one for me, I get cold sores occasionally but when i picked up smoking they increased like a fucking bitch in perfect correlation. Girls do not dig cold sores. I've quit for close to a year now and I've had just one cold sore since. That may not apply to you but, once you quit, you'll have half as many sick days, guaranteed. Less acne. Better physical condition. etc.
It is definitely worth quitting even in the short term.
In terms of quitting for me it was all about a complete lifestyle change. I'd been pretty miserable/stressed/depressed in my final year of school and i need to change things big style. Kinda reinvented myself as a much more social/cheerful person. Get a new more mature haircut, change up your wardrobe, start a new hobby, whatever it takes to shake up your old routine and change your outlook. Added to this try and distract yourself as much as possible from long boring blocks of time in which you're tempted to smoke. get up super early/go to bed early. Once you have a new routine, avoid at all costs slipping back into it.
Get a job. do your homework? find evening activities. socialise with non smokers as much as possible. tell all your mates that you are trying to quit. in fact tell the person behind the counter where you buy cigarettes regularly that you're quitting and make him promise not to sell you any. don't keep a stash of cigarettes once you have quit, throw away all your nice lighters or give them to friends. every time you crave a cigarette do 25 pressups, still craving? do 25 crunches, repeat as necessary until the thought is gone or you're to tired to get of the floor. This should also give you an endorphine rush and get you hench.
at the end of the day these are all just aids to help, and pick and choose the ones that you think will help you most, but it all comes down to willpower in the end. you do not smoke much at all (neither did I), so unless you manage to give up you are an incredibly worthless and pathetic person who cannot aspire towards any sort of fulfilling life.
