Winning is a HabitG 10

Winning is a Habit G10:
Complete 100 puzzles.

The quickest level I found while grinding out this achievement was the medium level called crosshair. If you use the technique of double clicking the lightbulb to show the next best two available moves, rather than doing one lightbulb click at a time, you will fly through the levels. I managed to get my time down to about 1.15 mins per level using this technique.

The lightbulb is found by clicking the right hand side of the phone screen, roughly in the middle.

Here is a solution that ScuzzyBunny wrote about and MathGuy42 kindly explained in the comments. You will need a Window's 8 and phone version to do this though

1. Start a puzzle on Win 8, for example, Dragon. Play until you only have 2 tiles left.
2. Press the Back arrow in the upper right.
3. Select Dragon on WP.
4. Select Cloud.
5. Complete the puzzle on WP. Push Back arrow on your phone to skip the fireworks.
6. Select Dragon on Win 8.
7. Choose Local. You'll see the same two tiles left.
8. Repeat Steps 2-7 until the achievement unlocks at Step 5.

Hope this helps.

ENJOY!!!