Limit SNG assistance please

Hi,

I've been playing online for about 3 months and can hold my own at low limit ring. Now discovered SNGs and currently have a 50 % success rate getting into the money (second place each time - clue to my query). Generally I think my SNG play is better than my ring BUT my Heads up is appalling, I'm completely lost and I make ridiculous plays as a result. I might have 90% of the chips and I'd still lose. Can someone point me to a good guide for this - remember I'm playing limit.

Also to anyone who multitables SNGs can you offer advice on how you manage them. I'd like to be 4 tabling but I daren't even 2 table yet as I foresee two tables of frenetic short handed action melting my brain (my weak heads up play contributes to this fear). I know staggering table starts should help avoid this but I just need some input to steady my nerves!