HIGH QUALITY BACKGROUND IMAGES

http://www.youthedesigner.com/2010/09/02/40-plus-various-high-quality-free-paper-patterns-and-textures/

http://lostandtaken.com/

http://www.mayang.com/textures/

http://www.reddit.com/r/EarthPorn/

http://www.reddit.com/user/karmicviolence/m/imaginaryexpanded

http://www.startextures.com

http://photography.nationalgeographic.com/photography/wallpapers/

http://www.hdwallpapers.in/

If you make your own graphics, most of these textures can be used as brushes in your photo manipulation software.

PHOTO MANIPULATION SOFTWARE / WEBSITES & FONTS

GIMP is 100% free and just as capable as Adobe Photoshop.

http://gimp-win.sourceforge.net/stable.html

pixlr is also free, but web-based. There are 3 editors, but the advanced editor is also pretty close to Photoshop.

http://pixlr.com

BannerSnack allows you to make flash banners. If you want an animated header, this is the place to go.

http://www.bannersnack.com/en/

GIF EDITORS - add effects, resize, add text, remove frames, etc

http://ezgif.com

http://www.online-image-editor.com

FONTS - download and install on your own computer or use Google Fonts to embed directly into your blog

http://www.dafont.com/

http://www.fonts.com/

http://www.fontsquirrel.com/

http://www.google.com/fonts

HTML / CSS / CODE RESOURCES

CSS explanations: http://www.w3schools.com/cssref/default.asp

Change your font: http://www.pagerank.net/css-font-style-wizard/

Change font, links, etc: http://www.somacon.com/p334.php

Resource site for CSS wizards: http://www.1stwebdesigner.com/css/powerful-css-tools-generators-automate-workflow/

WEBSITE ADD-ONS

Website Add-ons: http://www.entheosweb.com/website_design/free_web_tools.asp

Embeddable Forms: http://www.wufoo.com/

Translate your blog for foreign readers: https://translate.google.com/manager/website/

Social media buttons: http://www.niftybuttons.com

Everything and anything else you could possibly want to add or do to your blog: http://www.allblogtools.com/blogger-tools/

TUTORIALS

How to: Set up Google Analytics

How to: Use blockquotes

How to: Use "Shelve It!"

How to: Make reactive links

How to: Block people on BookLikes

How to: Batch edit your shelves

How to: Change your book count appearance

How to: Make your comment section more legible

Lists of tutorials, tips, and the like:

http://mandym.booklikes.com/post/470414/booklikes-tutorials

http://themisathena.booklikes.com/bl_formatting

I tried to link tutorials to the original poster. Please let me know if I failed on that.