Well the best way is to get a commercial link feeder club and to sign high profile players to increase merchandising.
Also take your sponsorship and prize money into account as you will usually make a profit once they are included. You should get about £30M sponsorship and a further £40M from league standings and tv rights.
Also what is important is to win trophies. They will increase your prestige which will in turn increase your sponsorship.
Main advice though is to flog Carroll, Cole and Aqualani as they will save you around £1M a month between them. Even if you only get a small fee its better to just get them off the wage budget. It can take upto 5 years to making a profit each month with liverpool unless you progress well in the Champions league consistently.