Hi!
I am too taking up CFA Level 1 in June 2016. Though I took it previously and my band (score was 10). Biggest reason for my failure was I avoided quantitative methods completely.
Few take away:
1) focus a lot of scoring full or at least 90% accuracy in Ethics, FRA, Economics, Equity &Corporate Finance. People with quant background can include quantitative methods too.
2) Mock tests are must.
3) Build up stamina as it involves nearly 9 hrs. 3 hrs two session. one hour prior to exam starts and one hour of break between two sessions.
4) Materials Schwesers, finquiz,etc.
Do pm if you need the access or sharing of few materials.
Regards
Celestial
(Kudos if its useful, will update a lot more in coming days)