$1 - $10 in MTT's and $1-$4 in SnG MTT's.
Wondering why up to $10 in Mtts and only up to $4 in Sng Mtts if Mtts have more variance?.
A good advice that someone give me is to not see your BR like $ but like Buyins, if you are playing $10 buyins and lose $50 could sound big for your BR but if say you lose 5buyins it looks pretty standard, happen to me when was playing the $6.50, if was $50 down sound very big for my BR, but if i see it like was 8 buyins sounds much better to your mind, 8 buyins down is standard so then don´t hurt much (then usually was looking to my worst down and find 15 or whatever buyins and make me feel better).
In your case if are mixing $5´s and $10´s then a $50 down is like 7buyins wich is nothing to worry, but if see it like lose $50 then your mind change that to monetary way and hurt in your soul.
About playing the $10´s, consider your avg buyin to get your levels, if are playing $5´s and $10´s then your avg buyin is $7.5, you will have 100 buyins with $750, but they key is to be ok to drop levels if for example go down to $500. If are ok to stick just to $5´s when reach $500 then i think is ok to play your $10´s here and there. If you were playing only $10´s with $700 then is different. (and still will be your money)
Just try to be cool with variance and see it like buyins. If get in tilt then take a break at least for a day, if play with fear then drop the $10´s. Important is to keep a goal, say when reach X amount going to drop to this, or can take shots when reach X amount.
If you do it thinking and set goals then you will be ok if stick to that.