I started playing deep into a season. I knew I had to make some changes, and bring in new blood. I made sure all my new players were okay passers and ball handlers. I got outrebounded some games, but every game my guys came away with less turnovers and more steals, and that won some games for me that I should have lost.
Ditto.
If every player on your team can at least find a team-mate and that team-mate is unlikely to drop the ball this is step one! Your opponent then needs to foul you to get the ball off you or out-rebound you. Add to the skills like defence and rebounding using training.. try investing your cash in the skills like passing/handling that are crucial for all positions. (disclaimer - just my opinion!)