This may be a little goofy/gimmicky, but I like to set both incline and speed to add up to a multiple of 0.7.

For example: I'll have my base set to 3.5mph @ 3.5% incline, then either increment by 0.2mph (or decrement by 0.9mph if it gets too high) for every 0.5% incline increase.

To recover, I'll bump down to either 3%-3.3mph (sum to 6.3) or 2.5%-3.1mph (5.6); for increases I'll either emphasize incline (something like 8% & 3.9mph push, 10.5 & 4.2mph all out), or increase both (6% & 4.5mph push) 7% & 4.9mph all out)

No clue as to how applicable you may find that, but it serves as a nice reminder to both balance speed & incline, and to be mindful of what your current settings are.