Spread yourself out
Definition 1 of 2
Pro Tip 1/3Not Always Positive
Sometimes implies overcommitment or lack of focus, so use cautiously. 
If you spread yourself out too much, you might not finish anything.
Pro Tip 2/3Caution with Thin
'Spread yourself out thin' suggests being overwhelmed by doing too many things. 
She's spreading herself out too thin with all her projects.
Pro Tip 3/3Effort Distribution
Used to advise diversification of effort for balance or risk management. 
Spread yourself out more to reduce the risk of one project failing.