Yes, but the ONLY way to accurately check your rankings in Google is to clear your cache and cookies, after every single search query is executed.
If you don't, Google will skew the results based on your search history.
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Check by yourself and the best method according to me is checking via Firefox SEO plugin bar...
The best tools is SEO Tool bar and Google analytics
IMHO
FOr all you guys that are doing it manually have you checked this tool: http://www.impersonal.me/
It's great - especially if you're going for ranks in a particular country/language...
as far as I have noticed it's just as good as clearing the cookies/search history etc