Sometimes, the opportunity arises for a spot of painting outdoors and the weather even co-operates, but by the time I've thought about what to take out of my normal painting equipment, half my painting time has gone.  To get around this, I keep a light-weight rucksack ready to go with just 10 items already packed:

• watercolour travel palette, with colour in pans and space to mix
• brush, squirrel hair round, size 12 (an elastic band holds this against my palette)
• black ink, fine tip felt pen, for sketching (optional watercolour markers)
• A4 watercolour pad or block
• a few sheets of kitchen paper towel
• a refilled, litre plastic bottle of water (for painting and drinking)
• a recycled plastic yogurt pot, (or collapsible water pot)
• small spray water bottle
• sunhat
• small towel, to sit on

With these bare essentials ready to grab and go when the chance appears, I no longer waste any time collecting what I need, when I could be painting instead!