Design Reference Links are always useful. Below is mix of bookmarks I recommend. There are plenty more links but these are a few I find useful.

NEWS AND INDUSTRY INFO

RGD Ontario
http://www.rgdontario.com

Creative Packaging Design
http://www.thedieline.com/

I Love Typography
http://ilovetypography.com/

Resources

Website Resources Centre
http://www.webappers.com/

DaFont
http://www.dafont.com/
*Be sure to read each set of terms, mix of personal, donate and free

Kuler (Colour theme creator from Adobe)
https://kuler.adobe.com/create/color-wheel/

Quick Reference

Website (Browsers) safe area
http://designerstoolbox.com/designresources/safearea/compare/
* Create your own templates in photoshop, illustrator etc so you always start with a reminder on constraints.

Copyright Proofing Marks
http://designerstoolbox.com/designresources/proofing/

*more solid links found at designerstoolbox.com