separate, adapt, modify, alter, jettison, adjust, cancel, abandon, redirect, decipher, defer, rethink, correct, improve, rework, revise, postpone, amend, arrange, reshuffle, rearrange, let go (of a plan), solve (a dilemma), cast aside (a plan), invent (a back-up), tweak (one's plan), switch (tactics), step back (to get an overview), regroup, split up, temper (one's enthusiasm), reorganize

force, gnaw, swarm, elude, flood, blind, baffle, confound, bewilder, disorient, hinder, impede, derail, obstruct, sting, devour, unravel, slow one down, obliterate (tracks), avalanche, slow one's pace

grope, wind up, roam, slip, mistake, overlook, neglect, guess, obscure, crisscross, drift, deviate, screw up, reel, misjudge, come to a halt, err, exhaust, end up, backtrack, wander, miscalculate, meander, strand, miss (a fork in the trail), sheer off course, fumble with (a map/compass), ramble, tromp, take a wrong turn