You must fly on Spud Nick's or Pieman's mining Junkers or my Mining Squid. The best way to get better is obviously with practice.
Lesmok, if using mines offensively, is a must have! Bring three range changing ammo types. I use Lesmok for long ranges, Charged for medium, and Incendiary for very short ranges. With lesmok, the mine will deploy slightly under your reticle while with incendiary, it'll drop like a depth charge so you have to aim higher than with the other ammo types. Don't aim directly at your target unless you're sure of range, instead, aim in front of them if they're going forward (obviously) and aim for their sides of they're moving slowly. If it deploys close enough, it'll still detonate, and if it doesn't, they'll still have less room to move in.
As you get better, you'll be able to deploy mines directly above or below a ship, quickly changing thier altitude. Putting a ship near the ground and placing mines above her is a great way to lock someone down or slam then back to the ground.
Combine the mine's awesome armor stripping abilities with an explosive weapon and you've got a very unusual, incredibly annoying strategy.