Try to give up smoking..what can i do?

Definitely. Do it!: Tobacco cessation requires 2 tasks. Overcoming nicotine addiction, and a deeply ingrained habit. Withdrawal symptomst last ~3 wks, and many can get past that with will power and nicotine replacement. Sometimes, in my opinion, the harder job is to change the habit. Avoid cues that you associate with smoking, tell family/friends to help, pick a date and get help and meds (varenicline from your md.

Cold turkey.: As far as quitting without any nicotine replacement, the cold turkey method is great, and has proven to be the most successful method overall. But plan it ahead of time. Pick a quit date in advance, maybe a meaningful date like a birthday or holiday, and gather people who are aware of your attempt that you can call upon for moral support if you start to falter. Good luck!!