Drybrushing - it's really easy. Using an old brush (this will ruin new ones), put a highlighting colour on the bristles (I'm using 'ochre' here, to bring out khaki - for field grey, use light grey, green, use lighter green and so on - I'm sure you get the picture), then wipe the brush off with an old rag, leaving virtually no paint. If you can wipe the brush over your thumb, and pick out the fingerprint, that's just about right. then tickle the figure with the brush, trying to go at 90 degrees to any raised detail (don't worry too much about this). Again, maximum effect, minimum effort, the details on the figure should highlight themselves.
Well, that's how I currently do 1/35 figures - bigger scales are a slightly different story, but if your eyes are younger than mine, you should find these little tricks work on 1/48, 1/72, and 25mm or 15mm figures. No substitute for experience, of course, but it's very easy to master. Get yourself a box of cheap toy soldiers and give it a go. You'll develop your own style. It's good fun, and I find it very relaxing - theraputic, even.
As ever, thanks for dropping by. Back soon with the riders in place.