Language is in german, but is a really good book for microtypography.
You can choose few good Sans, Serif, Script fonts and try to draw all characters with your own hand. That way you will better understand the form of letters
second the Thinking With Type post. great book, helped me
Make a collection of projects that you think are particularly awesome in the typography department, print them out, and take a pen to really critique what you think about the piece. What does it do well? What's the readability? What is the order in which you read things? What's the first thing that catches your eye? Are there any letterforms or words that look off? Why?
Always ask why.
Take also the time to train your eyes so as to make relevant fonts combo, try to do flyers, posters and so on
Lot's of cool informations in here, also for senior designer
Don't use any fonts that come with MS Word (PC system fonts)!
I second both Bringhurst and Thinking With Type.
Also, check out what kind of combinations have worked for others: http://fontsinuse.com/
have some good things and Hoefler & Frere-Jones also have a guide on combining (their) fonts, but its very useful I think: http://www.typography.com/ask-hfj/index.php
Also, try to find a handful of high quality fonts that You learn to use, and add on what You need.
nice resources, thanks folks!
draw and draw aaaand draw
First off – read the Spiekermann "Stop Stealing Sheep" and the Robert Bringhurst mentioned above, "Elements of Typographic Style". Follow this up by something from Emil Ruder, and you'll have a good foundation to build on.
general Tip: Find a few really well designed and manufactured fonts from a reputable foundry, and spend a great deal of time learning to use them properly in InDesign.
Get a font library application and save your fonts into categories. That taught me a hell of a lot :)