Yes, you can still be a master at your age (any age really). Getting to FM, IM, GM or even higher is another question, and may take natural talent or starting out really young.
My plan in general, and I'm a whole lot older than you, is to study tactics, tactics and more tactics. If you can improve your board vision (your memory of patterns) then an increase in chess strength will follow.
Don't get bogged down in openings. It's an attractive nuisance that will devour all your chess time if you let it. Also try to play more open and tactical openings if you can. When I was starting out, our local master/trainer encouraged us to play the King's Gambit and answer 1 e4 with 1... e5.
Specifically, I plan is to spend lots of time on the tactics trainer here at chess.com, as little opening study as I can get away with, combined with mainly Rook endgame study (they're by far the most common, and there are a bunch of good endgame videos here), and some middlegame strategy and theory. I'm wating impatiantly on Silman's 4th edition of 'Reasses Your Chess'. That'll eat up my study time for a good long while.
Once I'm confident that I won't make a fool of myself I'll dip back into the tournament scene. I've had a LONG layoff from chess, but I'm determined to be the best player I can. Who knows, maybe I'll rattle a few cages at the Senior Nationals or something. 
PS: there was one famous master, who's name escapes me now, who learned the game relatively late in life (in his 30's maybe) and still went on to become one of the strongest players in per-war Europe.

I really want someone who can motivate me and give me advise about my chess program. I am 29 years old already and working. I do not have the luxury of time to focus on chess. but I really want to improve.Can I still attain a Masters level at my age?
When I was in elementary years, I am a strong player. Back then I was 11-12 yrs.old.
I bought books and study. However, during my high school and colege years my interests was focused on my studies and I sacrificed playing chess.Now, i'M INTERESTED AGAIN. want to improve really. I think It would be a greta accomplishment if i Can be a master.
tnx