I just started bounty about one month ago. But now i am doing more than 20 bounties. Without any strugelling or crashing i am continuing my bounties.  I am using google doc sheet to manage my bourules list. If you can use google doc to do it you can do your all bounties without any one missing or confuse. There you can place your bounty ICO name in a colomn and place rules, tasks etc in next colomns. Always try to keep clear record about bounties. Use note pad to store you activity links.