So the importance of optimization for Google places is increasing. Only submitting the business information to Google places is not enough. The factors that you should follow are:
1- Give correct information while submitting about your business in Google Places.
2- Use correct address & phone numbers, you should use the data which are in the contact us page of your website.
3- Try to get some reviews on Google Places page from friends or other customers.
4- Try to promote your site in other local directories like Yellowpages, hotfrog, citysearch etc.
5- While submitting information on other local directories, use the same data that are being submitted on Google Places.
Please add more relevant information to this thread. Thanks.