Let me start by saying I'm no eyebrow expert. These are just tips and tricks that have worked for me..
For years I over plucked my eyebrows. If you want an idea of what they looked like before, have a look at this FOTD which includes an awful up close shot - oh how I cringed when I saw it! I pretty much had 'tadpole eyebrows' which for those of you who are unfamiliar with the term, means I had a thick section at the start of the eyebrow and then the rest got thinner until they were almost non existent. If that wasn't bad enough, I would fill them in every day with a dark brown shadow, square off the front with an angled brush and forget about combing through to blend the colour, of course I didn't bother with that!
It wasn't until I started seeing models with thicker eyebrows and started watching Lisa Eldridge on Youtube that I started longing for thicker brows. The first struggle for me was to quit plucking. I hate seeing stray hairs and my first instinct is to grab the tweezers but you have to just leave them be - of course you can still get the hairs between your brows, no one likes an unobrow!
To help my eyebrows along in the re-growth department, I brought RapidLash and used that every night which helps the hairs come through quicker and thicker. If you have the money to spare, definitely invest in a tube of RapidLash - you wont regret it! Once I'd started to notice them thickening up, I decided to dye them. My eyebrows are naturally an ashy dark blonde so when I dyed them it meant I didn't need to fill them in as much as they matched my hair colour and it shows up all the little, fine hairs you might not of known you had!
Once you have a decent amount of growth it's time to go in with the tweezers. I was lucky enough to be sent the Anastasia Brow Kit so I used a stencil from there, but you can find stencils in Superdrug and Boots. I opted for the full brow stencil, filled in my eyebrows and then plucked any stray hairs. I also brought a little spooly brush and a small pair of scissors and carefully combed any longer hairs down and trimmed them, this helps create your natural eyebrow shape.
The final step is to fill them in, and remember - minimal product! I use an eyebrow pencil or an eyeshadow and once my eyebrows are lightly filled in - only where needed, I brush them through with a spooly to get rid of any excess product. I then set them with the MUA clear mascara.
If you want to go for the full on 'Model Brow' like the photograph above, all I did was fill them in lightly with a powder, then brush through them with Mac's 'Beguile' Eyebrow Gel. This adds a base colour and then a slightly darker shade which really adds dimension to the brows.
I hope this is helpful in some way!