Let us consider one another (katanoōmen allēlous). Present (keep on doing so) active volitive subjunctive of katanoeō. The verb used about Jesus in Heb 3:1.
To provoke (eis paroxusmon). Our very word “paroxysm,” from paroxunō (para, oxunō from oxus, sharp), to sharpen, to stimulate, to incite. So here in good sense (for incitement to), but in Act 15:39 the word is used of irritation or contention as in the lxx and Demosthenes. Hippocrates uses it for “paroxysm” in disease (so in the papyri).
Unto love and good works (agapēs kai kalōn ergōn). Objective genitive. So Paul seeks to stir up the Corinthians by the example of the Macedonians (2Co 8:1-7).