Great post, blogging is hard. We run a travel blog and I think the most important thing we tell people is to travel with a purpose, Do not just wander around the world aimlessly. (Like ours is to experience and document the Top 100 Travel Adventures) So many travel blogs do not really have a purpose or a niche. Niche is key and many miss out on that because they want to cover and do it all. Do not just start a blog because you think you will get rich quick and be able to travel the world. It takes a lot of work and lots of time.
Perhaps the most popular network for placing these types of ads is Google AdSense. With this program, you do not need to be in direct contact with advertisers; you simply place the banner on your site, Google chooses ads relevant to your content, and your viewers click on the ads. There are countless similar programs available if you find that AdSense doesn’t work for you, such as Chitika, Infolinks, and Media.net.