As a beginner i've tried several different things at this stage and have had to learn fast. Lessons of a newbie:
Tactic 1 - wait for the big hand. I've been so tight that I'm down to 300 chips with 100/200 blinds. AK arrives and I push from any position and find 4 of us in the pot. Oh dear..... I'd have been far better of with 2 of us in the pot, with me holding J8o.
Tactic 2 - Throw them all in when a mult-way pot arrives, because I can quadruple up, right? Even my rudimentary learnings about the maths of this game tell me that's an idiot's move. I did it in my first few games though.
Tactic 3 - OK, I've played tight but have caught nothing and have 600 chips when the blinds are 50/100. I'm on the button and it folds to me. I call with the intention of seeing the flop then going in big post flop whatever my hand. Hey, that guy just reraised from the BB. I call I'm still going to have him. Hey, that idiot just bet on the flop, he was supposed to check. Suppose he must have a hand and I'll fold. Oh, I've only got 400 chips now. How did he know I was going to try and steal?
Tactic 4 - I've now learned to read people a bit and according to Poker Tracker there's a rock over the other side of the table. I'm in EP but I'll try and steal his blind. All in they go, whoops, that guy on the button has called my T5o with a pair of queens, isn't he scared by my tight table image?
Tactic 5 - Read this thread and get aggressive in late position with decent/half decent hands when there are no callers and I'm button or one off. Hey sometimes they fold, cool. Sometimes we go to showdown and I lose, sometimes I win and have enough to get semi-loose aggressive for the latter stages.
On average, if i play tight at the first 3 levels I catch one good hand and good flop in about 40% of the games. In those situations I will usually get to 1000-1200 chips by the time we reach 100/50, and we're down to 6/7 players. OK, I'm happy with that and can play for the money. In the other 50% I have to take a risk as in tactic 5 and may end up all in with a 40:60 shot at getting above 1000 chips.
So, by my maths that means in 64% of my games I get to 6/7 players with a mid size stack at the 50/100 or 100/200 stage. I then convert that to 41% in the money at my current rate (on $5 SnGs at Party).
Hope my ramblings are a little entertaining and add something to the thread.
The Don