Unless something drastically changes I'm not planning to... on PCBS at least.
I've been paying tariffs on PCBs for years, it was just the smaller orders that avoided it and it was always a hassle to split orders up like that anyway.
I'm not convinced you save much by splitting an order into two smaller orders to avoid tariffs, the additional shipping costs eat up any savings and the hassle alone makes me not want to bother. I used to play this "game" at checkout where I'd change quantities and swap Gerbers in and out to find the "sweet spot" where shipping was at a minimum while avoiding going over the $800 threshold. You could save a couple hundred bucks each time by doing that, but it literally took hours and any surprise surcharges (panelization, engineering fees, etc) would throw a wrench in the whole plan.
I finally just caved and started placing orders for what we need, ignoring any thresholds and just eating the fees.... more expensive yes, but the reduced stress level is worth every penny to me.

Not being able to prepay customs is a bit annoying, but I assume that will
eventually be possible again once the dust settles.
Some components could be affected, but those are already not particularly a bargain from here anyway.... they're offered more for convenience in those situations where you don't want to place an order with Mouser for a single zener diode or some oddball IC.