It would depend on what your dreams and aspirations are. Some are easy to achieve because they're safe bets or because they allow one to pursue their loves/obsessions/etc. Others are harder and take longer, if ever, due to many factors. The key is to make your dreams/goals/aspirations POSSIBLE ones. Let's face it--- I'll never be an astronaut. I can live with that. I won't bother to try and achieve THAT since it is an unrealistic goal ( though not necessarily impossible).
My aspiration/dream/goal was to have an Oldsmobile and I did it--- for me that was a given but it took awhile to achieve it. I feel good about it and that I set out to do something and did it. If I had wanted to achieve something else, like speaking to an auditorium full of people or heading a group/team of people--- I might never be able to achieve that. But I set a realistic goal, which centered around something I love alot, and I did that. And so my dream came true.
I've had other things that I've wanted to do, but I gave up because they were just too hard for me to do. I had to realize that these dreams/goals were not realistic for me ( though they might be for someone else).