I'm feeling lucky by default in Google Chrome

Open google preferences, search for search engines and add new search engine with following URL (the keyword doesn't matter):

{google:baseURL}search?q=%s&{google:RLZ}{google:acceptedSuggestion}{google:originalQueryForSuggestion}{google:assistedQueryStats}{google:searchFieldtrialParameter}sourceid=chrome&ie={inputEncoding}&btnI=I'm Feeling Lucky

Now click OK, open this panel one more time and check "set as default". From now on you can perform "Feeling lucky" search directly from Google Omnibox.

If you want to search Google as usual, type goo+TAB.