What I have gained from the practice of TM is an integration of the subtle field of consciousness with my outer consciousness which improves everything that I do. Much easier to handle stressful situations; think more clearly; creative ideas spontaneously come. Basically I feel better; have more energy; and get more done.
Tips: Best thing is to take a class from certified teachers who guide you into the meditation; answer questions; explain whats happening; and discuss experiences. It is very profound.
I know everyone likes to go onto the internet and find out everything, but Transcendental Meditation comes from an ancient tradition and it is best to have a teacher there to pass on the knowledge.