The best way to do it is to go to games that are far away. The ones I did a few years back to build up the history were Southampton, Newcastle, Sunderland, QPR, Cardiff, Reading, Everton etc. If you can make midweek games then those are usually good ones to target and sometimes go on general sale. Its much easier once you have 2/3 games under your belt as you could get tickets most of the time back then (when we were treading water under lambert).
one year i couldnt afford the season ticket though and lost all that history, so will be building it back up again from this season too. Just keep an eye out and make sure you are online when your category opens up for the games that are geographically far and you will likely have some luck