What advice would an experienced Objective-C/iOS developer give to a beginner?

Ry’s Objective-C Tutorial

98-222: Introduction to iOS Development

Portal

cocoachina
Swift 语言指南
NSHipster 关注被忽略的 Objective-C、Swift 和 Cocoa 特性

Blogs

Mgenware
Plumsoft
salam
一片枫叶
尼古拉斯.赵四
iOS Development Sites
破船之家
sunnyxx
里脊串的开发随笔
Norcy
Kenshin Cui's Blog
M了个J

Plugins

alcatraz

Icons

iconfont
easyicon
icons8
ionicons