This is a handy collection of painting tips and techniques that I have researched on the internet (so you don't have to!)
I thought it would be useful for you to have all this in one place so...
Please check back often as I will be adding more links whenever I have some spare time...

PAINTING - GENERAL TIPS & TECHNIQUES
Using Low Tack Masking Tape	Photographing Objects for a Still Life	Straight Lines
DIY Moisture-Retaining Palette	How to Set Up a Successful Still Life	Glazes
Where to Put Elements in Still Life	Protecting Reference Material	Create a Feeling of Distance
Getting White Whites	Easy Way to Use a Hairdryer	Don't Colour In the Shapes
Mixing Black	Using Impasto to Hide a Dent	Painting Ears
Put in Mid-Tones First	Taking reference photos for landscapes	Painting Eyes
Dust-free Drying	Get a Fine Line with Masking Fluid	Painting Human Hair
Top Tips for Landscape Painting	Top 10 Wildlife Painting Tips

TIPS & INSPIRATION FOR ARTISTS
Beating Painter's Block	Avoiding Creative Block	How to See Shapes
Don't Get Discouraged	What to Paint When You're Uninspired	How to Spot Mistakes
paint variations of an idea	12 Tips for Beating Artist's Block	How to Decide Where to Place Elements
Finishing a Painting	7 steps to a successful painting	Be Your Own Model
Increasing Productivity as a Painter	Overcome the Fear of a Blank Canvas	10 Tips for Loosening Up
Achieving Satisfaction as a Painter	Never Get Creative Block Again	7 tips to Improve Your Painting at Work

BRUSHES
About your paint brushes	Keeping Brushes From Going Hard	Paint Brush Preservation
Using a Toast Rack for Brushes	Organize All Your Brushes	Protecting Brushes From Masking Fluid
Fixing Brush Hairs	Retaining Brush Shape	Water for Acrylic Paint Brushes
Shampooing Brushes

CANVAS
Make your own canvas	Shape of Canvas for Landscape Painting	Choosing Between Cotton & Linen
How to prime your canvas	Removing a Dent in a Canvas	Tightening Loose Canvas
Adding Tooth to Hardboard

TUBES
Preventing Stuck Paint Tube Caps	Stuck Paint Tube Caps	Using Pliers for Paint Tubes

VARNISH
How to varnish your painting	Making Varnish Less Glossy

ACRYLICS - GENERAL TIPS
About acrylics	Acrylic tips	Having Enough of a Mixed Colour
Comparison with oils	Things to know before you buy supplies	DIY 'Stay Wet' Acrylics Palette
10 tips for beginners	Use Film Containers for Storing Acrylics	Cleaning a palette
Acrylic Medium Bottles	Using & Storing Acrylics cheaply	Creating a Magnetic Palette
Extending working time	Storing Unused Acrylics	Off-White for Distance
Keeping Acrylics Moist	Underpaint Oils with Acrylics

ACRYLICS - TECHNIQUES
Cracking technique	Watercolour technique