About.com for Travel Tips
The Website About.com (www.about.com) has a useful section on budget travel. It includes information on most parts of the world, and up to date information on subjects such as budget travel in Mexico or free things to do in London.
I was surprised to see the section on low cost travel in Mexico, which used to be generally a very affordable destination. However, I haven't been there since the 90s and I gather things have changed, especially in the big purpose-built resorts like Cancun and Puerto Vallarta. Generally in Mexico you are better off avoiding the resort areas and visiting the old colonial cities in the interior, or the country's many archeological ruins.
A section on budget travel in Europe was somewhat out of date, but it included some good ideas, such as taking a cruise to visit a number of European ports at modest cost. This would be especially good for Scandinavia, which tends to be expensive. On Baltic cruises you usually visit ports such as Copenhagen, Stockholm, Helsinki, Tallinn and St. Petersburg, or the Norwegian fjords. Most of the big cities in Scandinavia and Russia are relatively costly, and Norway, from what I have read, is extremely expensive.
If you pick the right cruise, you can explore this area for $100 per person per day or less.