In astonishingly general terms, there are 3 main techniques used. You must be agile enough to switch strategies quickly as the course of the game unfolds.
The Blockade
This consists of assembling a 6-thick wall of pieces, or at a minimum as deep as you are able to achieve, to block in the competitor’s pieces that are on your 1-point. This is judged to be the most adequate tactic at the begining of the game. You can assemble the wall anywhere inbetween your 11-point and your two-point and then shuffle it into your home board as the match advances.
The Blitz
This consists of closing your home board as fast as possible while keeping your competitor on the bar. e.g., if your challenger rolls an early two and moves one piece from your 1-point to your three-point and you then roll a 5-5, you can play six/one six/one 8/3 eight/three. Your challenger is now in big-time calamity due to the fact that they have 2 pieces on the bar and you have closed half your inner board!
The Backgame
This course of action is where you have 2 or more anchors in your competitor’s home board. (An anchor is a position consisting of at least two of your checkers.) It must be played when you are extremely behind as it much improves your opportunities. The strongest places for anchor spots are near your competitor’s smaller points and either on adjoining points or with a single point in between. Timing is important for a competent backgame: at the end of the day, there’s no point having two nice anchors and a solid wall in your own inner board if you are then forced to break down this straight away, while your opponent is getting their checkers home, taking into account that you do not have other extra pieces to shift! In this situation, it’s more favorable to have pieces on the bar so that you can maintain your position until your challenger provides you an opportunity to hit, so it can be a wonderful idea to try and get your challenger to hit them in this case!