Hi guys

I used to have BA Silver status because I travelled frequently to the US, however recently I have not been, and my Silver status has lapsed - hence me asking this question.

Basically, what I would like to know is: what's the fastest way of getting BA Silver Status?

Next month I'm flying from EDI-LHR-LAX (in Club), return so this should help me get closer to the 600 Tier points needed. Where should I go after this to achieve BA Silver?

Thanks in advance
Marc