Use all the information
Many, if not most, mistakes in navigation are made because only one or two variables are used to check position. A map usually contains a wealth of information, much of which may not appear relevant to your immediate location. This information can be used to your advantage for confirming the accuracy of decisions based upon only one or two variables. Two creek junctions may appear to be quite similar but they can usually be identified by checking the detail of the ridges and spurs surrounding them, or by the distance or direction from some other feature.
For handy reference, copy Table 11.1, and attach it to your map case. Considering all these factors should give the same position. If not, reassess your position and direction of travel very carefully.