Recently while playing online MTTs I have been fortunate enough to build some very nice sized stacks, however I haven't really capitalized. The only adjustment I really made was to pick on some of the really small stacks. I would like to learn how to take greater advantage of these situations. Any advice would be appreciated.

Play aggressive. Raise the hell out of everything when you have position and take advantage of situations where lets say you are MP and nobodys raised and say for example there are passive players to your left- raise, and it doesn't really matter what you are holding. Be ready to fold though if a small stack wakes up- they are looking to double up and nothing else. Once you get a read on the table it's fairly easy to bully your way to the money, and then the top ten.
Also, if there happens to be a bigger stack than you in the room- DO NOT BE TIMID. RAISE HIM AS WELL- conventianal thought says you pick on the small stacks but you want that big stack to respect you, so, if you see him doing what I am telling you to do you can reraise him and get him to fold what ever B.S. he is raising with. Have the sense to fold to him though when he is out aggressing you- what happens is you both end up tagteaming the table and sort of just stealing blinds and passing them back and forth- it's advantageous to both of you. Now, if you get lucky you can catch a few cards and outplay him when you do see a flop- this is my favorite part of bigstack poker, when I can take out another big stack when he/she makes a mistake. Adding 600 chips at atime is great, adding 10,000 at once is better.

Overall I would say that my simple advice is prey on fear- these guys do not want to bust out. Use it against them.

The bubble is your best friend

Raise, raise, raise. If it's folded to you, raise. Eventually they'll play back at you. Then you have to read your situation. There's a great post about his on 2+2, let me see if i can find it. Just so I don't have to type a lot...

Well, I couldn't find it.

Now take this with a grain of salt. You have to adapt the the table, you can't just apply a "strategy" all the time.

If you want to build a big stack, you have to take advantage of situations and stack sizes. At the lower levels, you'll find something interesting. A lot of players with short stacks will fold for all their chips, even if they have 3/4 of their chips in the pot. You have to really watch the play to figure out who's going to be easy to pick on.

In my opinion, stay away from the other big stacks if you don't have a hand. Often they'll see what you're doing and they'll repop you if you get too aggressive. So if you pick up AA, make a raise into their blind hoping they'll repop you.

Now don't get too crazy, usually in this case, if someone plays back at you, give them the benefit of the doubt that they have a hand, unless you have reason to believe otherwise. If you've stolen a guy's blind for 3 orbits, and all the sudden, he pushes your raise, give him credit for a hand and go from there. Sure, he could be getting fed up, but if he does have a hand, he's getting his blinds back with interest.

A good big stack style can be described as:

Controlled, super aggression.