Given that the project heading to an ICO has really great potential, is well-elaborated (also in the white paper), and is lead by a credible, experienced team, you'll need:
- a robust landing page with right emphases and all relevant information, and
- a bunch of marketing activities using these instruments listed in
another thread:
1. Classic PR - press releases, interviews, Q&A
2. Banner advertising - display ads for extensive reach
3. Influential marketing - connect with opinion leaders.
4. Social media - connect with audience & opinion leaders.
5. YouTube - statements from founders, project introduction.
6. Bounty campaigns - referrals showtime.
7. Placements in blogs - native advertising.
8. Viral media - videos or pictures.
9. Community marketing - you know, Bitcointalk.
10. Events - meetups, conferences etc.
Whitepaper? Hell with it, we will have an alpha version of complete working product!
Credible, Experienced Team? No

But we are ready to learn anything and every famous guy started at zero! And we are learning each day!
Landing page? Sure, easy peasy

Marketing? I have a fine knowledge of marketing and have done for few company, but I have not yet done for an ICO, which soon will change
