I have found that when time poor and budget constrained, taking organised tours to see the key highlights of certain parts of the world through tour operators like www.gadventures.co.uk or www.tucantravel.com can be a good option. For those who are more independent, you can always choose tours that have some days when you can do your own thing.
And if you would rather organise and travel as you please, or even free-style it, my respect goes to you. I am incredibly lazy when it comes to admin and paperwork so when someone tells me they will sort out accommodation and transport across five countries, I am at peace. Although, when I hear stories of people who spontaneously took a few months off and jumped off some random cliffs in isolated beaches, I try to reconsider my laziness. Either way, it's totally up to you.