Well first of all you should start with what you already have. Of those hits that you are getting where are they coming from? How did they get to your page?
#2 - Optimize your page(s) so that they get placed higher in the rankings of the search engines.
#3 - Identify your target market. Who is most likely to buy your services? I have seen many posts from travel agents that have said that their business is slow to dead yet I have seen articles and heard on television about travel agents that have more work than they can handle. How do they do it? If you're really serious about wanting to make your travel business successful then you're going to have to start to treat it seriously. Since you want it to be your source of income (and a good income I'm assuming) then you're going to have to take a good look at it and get the ideas that will help you sell it to others. You'd be surprised at how many ideas will come to you if you just leave it for a day - take a break and put it out of your mind - then come back the next day and take a good look at it.
Define your target market and then go after them - both online and off!