PetraPixel is amazing, and the CSS Layout write up genuinely is what made webmastery feel accessible to me. It's so easy to read and understand. Her widgets are also epic.

W3 Schools is great for general coding help. Whenever I google coding questions I always look for the W3 schools link first HA.

For general questions if you can't find help elsewhere, I've been using Melonland Forums. Everyone there is so knowledgable and kind.

Reddit LOL (usually r/neocities, r/css, etc...)

CSS Backgrounds is a great site for creating simple background patterns with CSS! Super easy to use.

For fonts I usually use Google Fonts, though I hear Fontcity is also really good.

If you dont know how to add fonts, I literally just use MartinDisk's guide on Reddit. Another super simple and easy to understand guide.

I also use Webdeck Player as my music player. Super neat!

For a marquee I've been using ColdCalzone's Code.

For my comments box I used Cbox and it's super nice!

For a visit counter I use FC2! Super easy to set up and super customizable!

An epic in-browser coding tool I use is CodePen.io, just way easier for me to use than Phoenix ngl.

For my RSS feed, I used this tutorial by Caffeine and Lasers to set it up, and I also use QuietRSS for all my RSS needs.

I use DimDen's NavLink Ads for the silly fake ads on my sidebar.

Some code snippets that help me out and can hopefully help you too!

Hide scrollbar through CSS (im p sure works for all browsers)

div {
    overflow-y: scroll;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
div::-webkit-scrollbar {
    display: none;
}

Directories

These are directories to multiple other resource sites, or a big mix of different graphics!

Offiz's Gifs, Bonnibel's Graphic Collection, Biscuit, Supplies.Ju.Mp Thuvien.org blinkie-net gifcities.org

Tiled Backgrounds/Textures

Betty's Graphics, CodePen, Pixel Moon Dust, TextureTown

Blinkies

Adrian's Blinkie Collection

Buttons

Anlucas, Yesterweb, Neonaut, Dabamos

Buttons World

Stamps

Silly Rat Stamps Collection, Adrian's Blinkie Collection Stamps

Misc Pixels & Gifs

Pixels, Pixeloving, GifCities