Bounties, missions and more missions.
Quite a bit of my work is done on low inf factions to reign in the growth of (usually) a controlling faction. Usually the only option is missions, and after the first day realised they were not having the effect they normally would have. There was some effect, perhaps as though 1+inf was applied (as I assume any mission where the cash or rep reward is taken) have.
With trade, I usually go with multi-hauling, small qtys of several commodities. Large qty (single commodity hauling) still appears to work.
For bounties normally I use 1mCr as a guideline, now I am using 1.5mCr. It seems to work as expected, but of course isn't an effective option for (usually) more than one or two factions in a system.
With exploration data, nothing I have tried so far has had any noticeable effect on inf, but again I haven't done much testing.
In all cases I am comparing the effect of my actions post-update with the effect I am used to them having in systems I am familiar with & regularly work.