Does anyone know how to make a glow around objects when colouring with Photoshop? I've tried looking for tutorials, but come up short.

Okay, there's the obvious 'beginner' way, where the object is on a new layer, you double click that layer and put it on 'outer glow' mode.
Then there's the cooler way, where you make a new layer, put the blend properties of the layer onto 'linear dodge' and draw your glow on, on that new layer as seen on the following two pages:
http://www.drunkduck.com/FanDanGo/index.php?p=257737
http://www.drunkduck.com/FanDanGo/index.php?p=199847
The second technique is a little more advanced, but can look a lot better.

I like simply using a soft airbrush to add a glow effect. Simply add a new layer on top of what you wish to glow and find a brighter color and "draw the glow on.

Sometimes I use different colors on the same glow to give different tones and areas of brightness.

I also like the effect when you use a selection tool to select an area. When you do that, look at the top area and find the Feather box. Set it 20 px or so (play around with it). Create a new layer on top of your drawing. Once you've got your area selected and feathered, use the paint bucket to fill in the selected area at a lower opacity (I dunno, 10-20%, again play around with it). It's not an official glow, but I think it gives a nice warmth to the glow.

That's a great tip!

arteestx
I also like the effect when you use a selection tool to select an area. When you do that, look at the top area and find the Feather box. Set it 20 px or so (play around with it). Create a new layer on top of your drawing. Once you've got your area selected and feathered, use the paint bucket to fill in the selected area at a lower opacity (I dunno, 10-20%, again play around with it). It's not an official glow, but I think it gives a nice warmth to the glow.

That's a pretty simplified version of how I've been doing glows since photoshop 2.5

:-)

1. Duplicate the layer you want to have a glow

2. Lock the layer copy and fill it with white (or bright color) so that only that shape (of the layer) gets filled with your color.

3. Unlock the layer and drag it directly beneath original layer in layers window

4. Do a gaussian blur with the preview selected so you see how much it glows (blurs) and apply when pleased. Depending on what dpi you are working with the pixel count varies - usually 5 to 10 pixels for 72 dpi - up to 25 or more for 300 dpi and so on.

Done :o)

Takes about a minute tops.

1. Duplicate the image you want to glow
2. Create a layer behind the duplicated image
3. Use a soft, blurry brush (with the color of your choosing) and go around the image (tip: go under the image as well)
4. Gaussian blur it slightly
5. You can also change the opacity if you don't like the brightness

Well, that's how I do it :)