how can I get my google adsense cheque?
First reach over the payout threshold then they pay you by the terms you set (direct deposit or check) the end of the month following the month you reached that threshold. They have an area in your account that shows when you will get paid.
The best way to get your Google Adsense Payment is through CHECK
Nothing else... not Western Union, Bank Transfer (as those are hard to track whenever it runs into issues, people might be able to steal your code and use it for themselves)