1st and foremost, congrats on the win!
There are several articles on BRM out there and I doubt I can improve on any advice given. However, I will share my personal BRM strat, so take from it what you will.
Almost every serious MTT grinder has experienced the good and the bad - extended periods where you can make every correct move and still get screwed time and time again as your 80/20s and 70/30s consistently fail to hold. My personal worst was a 25K downswing over a few month period, with an ABI (average buy-in) of about $60/game. Thankfully I had deep-pocketed backers and was able to turn the trend over a solid 6-week period. Given most (including me) do not have the seemingly unlimited BRs, I try (I emphasize "try") to play by tighter BR rules.
I like a 2% rule for buyins, re-evaluating after each session. I also believe in taking shots, allowing myself to exceed this on occasion. For example if I was going into a Sunday session and was working with a personal BR of 6K, I might decide to allow myself to play the Millions. The rest of my games would be 109s and lower. However, I never forgot my bread n butter games and would always pepper my schedule with plenty of 11s and 55s to help maintain BR, given I knew I had a greater edge in these fields. Variance busters most would say.
Utilize satty options. Give yourself the ability to play bigger games by satelliting into them. I played the Wed $320 on Stars several times by doing this. Keep track of the dollars you spend, though, and give yourself limited shots for each. Those with better BR methods would advocate using the first seat as T$ and playing a second seat if won.
Do not be afraid to drop down if you experience the downside of variance. With an unlimited BR you should obviously play any event you have an edge in, but with finite means, you need to be willing to drop your levels. The 2% rule allows this to occur naturally.
Best of luck going forth. Proper BR management can keep you afloat for the years which come.