The self-petition roadmap: I-140 first, then I-485 or consular

For EB-1A and NIW the sequence is usually this. You file the I-140 immigrant petition for yourself. If approved and your priority date is current on the visa bulletin, you either file an I-485 to adjust status inside the US or go through consular processing abroad. Your priority date is set when the I-140 is filed, so filing sooner locks your place in line even if you are not ready for the next step. Where are you in this sequence?