Lens cleaning equipment such as blower brushes and compressed air can take up quite a bit of space in your bag. The folks at Digital Camera World have come up with a novel DIY way of keeping things compact by transforming paintbrushes into portable tools for cleaning off minute particles when shooting in dusty environments.
All you need is an inexpensive paintbrush that's readily available at any craft shop. Use a hacksaw and saw off the bulk of the handle and sand the edges with a file or sandpaper.
If you have a power drill lying around, drill a small hole into the stub of the paintbrush and fit in a split ring -- the same kind you use to hold your house keys -- and you'll be able to attach your new "lens brush" to your camera bag or satchel using a small carabiner.
The site also advises sticking some double-sided tape underneath your lens cap to act as a dust trap to keep your front element spick and span. If you're handy with tools and have some spare time, this DIY project is well worth a shot (pardon the pun).