I managed to find an ad for a babysitter that fit my busy work schedule, and that led to more options for babysitting as my name was circulated among the mothers. Soon I found myself most Friday and Saturday nights being paid for watching TV for a few hours, while the baby slept. It gave me time to do some course readings and prevented me from spending valuable travel money on nights out with friends.
I try and put as much money as possible in my savings account. I also try cook at home and try to refrain from buying expensive gadgets or more clothes or fancy meals in order to afford trips that have a much greater chance of significantly changing and shaping my life.
Then I also apply to as many scholarships as I possibly can. To study abroad in Jordan I applied to five different scholarships, and I was rewarded one for $4,500 that required me to do a follow-up project. I'm currently writing up the project report for that. To go to Israel this summer I applied to four different scholarships, and I was awarded two of them, $1000 each. To go to Jordan this summer, I got accepted to a program to help me write a thesis that gives me a $500 research grant. There are lots of places to look for scholarships or funding, and they often require you to just post a couple of blog posts, write up a report when you return, send a personal letter to donors, or pledge to do something like a project or a thesis.
Flight deal sites
Visit family and friends
I got to see Istanbul in September AND December by having two 24-hr layovers, and I actually saw a lot! Iceland this summer will also just be a prolonged layover, but I'll have time to see the most famous natural sites and attend the Reykjavik Jazz Festival. Turkish Air and Iceland Air, as well as other national airlines, make deals like that to promote tourism in their country.
Finally, I follow a bunch of travel blogs that constantly inspire me. Here are a couple of good ones:
http://almostfearless.com/about/ (also check out her "Blogs I love")
And my favorite travel website has lots of tips:http://matadornetwork.com/notebook/how-to-move-to-paris-with-no-money/
Other options could also be volunteering abroad. I went to Ecuador for 5 weeks and had a life-changing experience, thanks to a relatively cheap local volunteer organization. I was completely immersed in the local culture since there weren't any other volunteers from any of my countries (Sweden, USA, Malta) and learned so much about what I am capable of as an individual.
There is also World Wide Opportunities On Organic Farms (WWOOF), which I've always wanted to try but haven't had the chance to do. You basically offer to work on a farm, anywhere in the world, for a certain amount of time, in exchange for food and accommodation.