Stack Size Mistakes

Looking back over my recent hand histories, I noticed two spots where I folded top pair when reraised on flop, flatted then villain smashed the betpot button on the turn. Both were dangerous boards and I think I made correct folds in both instances. But I think my major mistake was playing a post flop pot with a top pair sort of hand where the ratio of the pot to the stack sizes once we reach a flop is not good for us should we hit. I could have made a big mistake by folding the best hand to a strong draw in a big pot. So this is adding more fuel to the part of me that thinks I should start playing a limp stab style so that I can develop my hand reading skills and also so that I'm not making big mistakes by 1/ folding the best hand in a big pot 2/ getting the money in as a dog in a big pot. Generally if we're only ever making mistakes in small pots then we shouldn't be doing alot wrong. Once the stack sizes come down a bit then we can start raising as we'll be able to commit our stack much easier on favourable boards. So, how do we disguise our hand? When I raise most buttons it's easy for villain to make mistakes as my range is disguised. If I'm going to limp every pot I need to do this with strong hands too, so that villain never knows what I have and we can then build/control the pot size as needed.
Another little trick I'm going to start using is a rule of thumb for commitment decisions. Usually my thinking goes like this: " I have top pair let's get it in!! "
What I should really be asking is this: " Given the stack sizes and my opponent, will my hand be ahead of his range should we get all-in? ". If the answer is yes, we can raise. If not, it's better to take a passive line or if the hand is likely to end up with a stack decision we should just fold.