I think a good choice would be the expression within reach.
I need to keep my phone within reach.
The expression is often used to say that something is close enough to be picked up right away. In the case of the phone, the phone is literally within reach (that is, within an arm's length, or maybe nearby in the same room). However, the expression can be used figuratively as well. For example, a university might advertise by saying something like:
A better way of life is within reach.
meaning that, once you get a better education, there's a good chance your lifestyle will improve.