Hey guys, I need some quick pointers as I can't get my head around what to do effectively in these situations.

Firstly, say you're dealt two suited cards, let's assume one is an ace, and then two more of that suit appear on the flop. How would you bet the next round? Just call/check? Call minimum raises?

Same goes for straights, say you have 8,9 dealt and 10,7,2 appear on the flop, how would it be played generally?

And secondly, any tips for when tournaments end up one on one at the end? There's so much bluffing and raising and all ins it gets confusing.