Once ur SH in an SnG, u hav to steal blinds to maintain abd possibly build on a decent stack. As celvernapkin stated, the 2 main factors are opponent styles and stack size in relation to blinds.

Generally u should b able to steal around 2 hands every orbit with marginal holdings (i.e. K10 or better, Ax). However, you must pay attention to who you're stealing, as you wouldn't want to play the big stacks or the shortstacks who would push a lot in these situations. Position is also important. Vary your play in case your opponents catch on (i.e. if you always steal from SB, with similar holdings...etc.).

As for your opponents not respecting your raises, you should have a fairly solid/tight image going into SH play. If not, you probably have to steal a little less and pick your spots more carefully. Another way to gain respect is showing down premium or monster hands when your opponents fold.