How does evolution affect us today?
It is hard to say. Here is a start of answer, but maybe you could make your question a bit more precise.
The evolution is a constant slow process that all beings have.
Evolution takes place at the scale of a population, not a the scale of a specie or an individual. It is a modification in the gene pool of a population.
As a matter of fact, it is hard to talk about the evolution of the human specie. However, it is easier to refer to the evolution of the european, asian or african populations (or even at the scale of a country)
We never stopped evolving, like many people seem to think, we are constantly doing it (the gene pool of the different human populations will constantly be modified, be it only by immigration and emigration).
However, with the means and the technology we have now we are more likely to control our evolution (ex: transplants, work on DNA, control of our environment, ...)
I hope I answer your question. Maybe you meant how the things that happened in our evolution are affecting us now, your question is not very accurate.