Below are a few of my favorite sites - most of them get a daily visit.

General Design Inspiration:

Swiss Miss
Designspiration
GraphicDesign Exchange
The Dieline
The Fox is black
Design Work Life
September Industries

Web Design + Inspiration

Mind Sparkle (nice collection of homepages)
Webdesign Served (from Behance)
Awwwards

Interior Design Centric:

Design*Sponge
Apartment Therapy
Desire to Inspire
The Brick House
Remodelista

Hungry? If not, you will be after looking at these... 

Sunday Suppers
Farmhouse Delivery
Sweet Paul
Smitten Kitchen
WhatKatieAte
Tartlette
Roost Blog

Blogs

BigBang Studio
Kinfolk
Graham&Co
Wit+Delight


Photography:

The Makers Project
Shorpy
Ken Rockwell
Saipua