I gave up 30 years ago, cold turkey, when they went up to £1.50 a pack. I just thought that was such a ridiculous amount to pay, literally going up in smoke!! I really wonder how people afford to smoke these days.
Try to make sure you have something to occupy yourself, sewing/knitting or even jigsaw puzzles. You need to break habits based around having a smoke - after meals etc.
Think to yourself how you will be healthier, saving money, how much nice your home and yourself will smell (I hate standing by someone who smells of stale smoke) and how proud your grandchildren will be.
Maybe try limiting yourself to certain number of cigs and gradually reducing each week, if you don't think you can give up in one hit that might help you.
Good luck, if you really want to do it and have the determination you will succeed.