When working alone, other techniques are necessary. Analogies and inversion are
often useful. Attempt to draw analogies between the problem at hand and other physical
contexts. If it is a mechanical problem, convert it by analogy to a fluid or electrical one.
Inversion turns the problem inside out. For example, consider what you want moved to
be stationary and vice versa. Insights often follow. Another useful aid to creativity is
the use of synonyms. Define the action verb in the problem statement, and then list as
many synonyms for that verb as possible