Like some of us here are saying: you do not bother with a trademark untill you have (something to show, for sale) "goods" or services to hit the market to make some loot.

Once you have chosen your mark, you must also be able to identify the goods and/or services to which the mark will apply, clearly and precisely. The identification of goods and/or services must be specific enough to identify the nature of the goods and/or services. The level of specificity depends on the type of goods and/or services. For examples of acceptable identifications, please consult the Acceptable Identification of Goods and Services Manual (ID Manual). NOTE:Under U.S. Trademark law, class headings from the International Schedule of Classes of Goods and Services by themselves are not acceptable for registration purposes. The specific items of goods and/ or services must be listed.

more here: http://www.uspto.gov/trademarks/basics/

and here:http://www.uspto.gov/inventors/trademarks.jsp

good read on benefits of trademark: http://www.marklaw.com/trademark-FAQ/benefits.htm