Write to all your contacts from the past without an exception and without any expectations

Build a prototype, actually keep building them all your life – show them off proudly to whoever comes your way. The world likes a toy

Buy a database of prospective customers; send them a power point or a PDF document explaining what do

Call on your large competitors installed client base in person – do not just push your products and services

Always ask your existing customers to give you new leads

Always go back to people who disqualified you in bidding round for some business you were competing for and update them on what is new and different at your end

Keep your banker periodically posted on what you do, ask her for leads

Visit trade shows regularly and talk to people at exhibition stalls about what you do. Specially make it a point to attend vertically-focused, industry-specific trade shows

Become a member of the right industry bodies. Attend their events and seek opportunities for participation through speaking engagement in their seminars and conferences [i.e. Data Security Council of India]

Track new investments coming up in various fields through venture funding and private equity. This is publicly available information. Write to them and follow up with a phone call.

Have a great website with Search Engine Optimization [SEO] done, so that website-generated leads can come in

Invite customers to visit your premises

Speak to a few very large competitors and see if there is an alliance possibility

Go along with sales person and understand the customer requirements without fail

Periodically attend learning conferences and network with speakers and attendees

Speak to the person seated next to you – in an airplane, a business lounge, a dentist’s waiting area or an industry event and ask him what he does – explain her what you do as well