How to optimize PHP & MySql to speed up your blog site?

[oodood]

hello all,
Hello all,
I'm trying to find out the solutions for my blog site optimization.
I've optimized all images but it helps decreasing download time only 2 seconds.
The database of my site is very big; Thailand Travel Online (http://www.thailand-travelonline.com/).

Any suggestion?
Tnx. :o

[volunteeer]

Optimizing mySql database is huge topic. You can start here:
http://dev.mysql.com/doc/refman/5.0/en/optimization.html