Transition words signal the structure of your paper to your reader.

Logical Connection	Transition Expression
Similarity	also, in the same way, just as — so too, likewise, similarly
Exception, Contrast	but, however, in spite of, on the one hand — o.t.o.h., nevertheless, notwithstanding, in contrast, on the contrary, still, yet
Sequence, Order	first, second, third, — next, then, finally
Time	after, afterward, at last, before, currently, during, earlier, immediately, later, meanwhile, now, recently, simultaneously, previously, briefly, eventually, gradually, in the future, until now, formerly, in the past
Example	for example, for instance, namely, specifically, to illustrate
Emphasis	even, indeed, in fact, of course, certainly, truly
Place, Position	above, adjacent, below, beyond, here, there, in front of, in back of, nearly
Cause & Effect	thus, so, therefore, consequently, as a result, accordingly, hence
Additional Support/Evidence	additionally, also, again, and, as well, besides, equally important, further, furthermore, in addition, moreover
Conclusion/Summary	finally, in a word, in brief, briefly, in conclusion, in the end, in the final analysis, on the whole, thus, to conclude, to summarize, in sum, to sum up, in summary